Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
Sep. 30, 2016 |
Jun. 30, 2016 |
Mar. 31, 2016 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Quarterly Financial Information Disclosure [Abstract] | |||||||||||
| Total interest income | $ 195,105 | $ 196,089 | $ 184,741 | $ 169,154 | $ 160,285 | $ 153,358 | $ 141,681 | $ 119,756 | $ 745,089 | $ 575,080 | $ 592,879 |
| Total interest expense | 94,795 | 99,427 | 85,281 | 70,685 | 63,219 | 57,974 | 51,848 | 40,243 | 350,188 | 213,284 | 141,790 |
| Net interest income | 100,310 | 96,662 | 99,460 | 98,469 | 97,066 | 95,384 | 89,833 | 79,513 | 394,901 | 361,796 | 451,089 |
| Other-than-temporary impairment losses | (360) | 0 | (429) | 0 | 0 | (1,015) | (90) | (717) | (789) | (1,822) | (535) |
| Total other income | 103,288 | 23,060 | (57,197) | (35,585) | 304,104 | 31,956 | (94,995) | (133,677) | 33,566 | 107,388 | 167,837 |
| Total expenses | 30,593 | 31,844 | 38,614 | 28,870 | 33,313 | 34,954 | 34,328 | 34,532 | 129,921 | 137,127 | 142,879 |
| (Benefit from) provision for income taxes | 10,618 | (5,342) | 8,759 | (24,517) | 38,443 | (16,825) | (14,761) | 5,458 | (10,482) | 12,314 | (16,560) |
| Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent | 3,877 | 8,844 | 14,157 | 13,454 | 11,989 | 9,590 | 7,838 | 5,941 | 40,332 | 35,357 | 138 |
| Dividends on preferred stock | 11,949 | 8,888 | 4,285 | 0 | 0 | 0 | 0 | 0 | 25,122 | 0 | 0 |
| Net income attributable to common stockholders | $ 153,955 | $ 93,176 | $ 4,333 | $ 71,985 | $ 341,403 | $ 117,786 | $ (16,981) | $ (88,930) | $ 323,449 | $ 353,278 | $ 492,210 |
| Basic earnings from continuing operations per weighted average common share (in usd per share) | $ 0.86 | $ 0.48 | $ (0.06) | $ 0.33 | $ 1.89 | $ 0.62 | $ (0.14) | $ (0.54) | $ 1.62 | $ 1.83 | $ 2.70 |
| Basic earnings from discontinued operations per weighted average common share (in usd per share) | 0.02 | 0.05 | 0.08 | 0.08 | 0.07 | 0.06 | 0.04 | 0.03 | 0.23 | 0.20 | 0.00 |
| Basic earnings per weighted average common share (in usd per share) | 0.88 | 0.53 | 0.02 | 0.41 | 1.96 | 0.68 | (0.10) | (0.51) | 1.85 | 2.03 | 2.70 |
| Diluted earnings from continuing operations per weighted average common share (in usd per share) | 0.82 | 0.47 | (0.06) | 0.33 | 1.89 | 0.62 | (0.14) | (0.54) | 1.60 | 1.83 | 2.70 |
| Diluted earnings from discontinued operations per weighted average common share (in usd per share) | 0.02 | 0.05 | 0.08 | 0.08 | 0.07 | 0.06 | 0.04 | 0.03 | 0.21 | 0.20 | 0.00 |
| Diluted earnings per weighted average common share (in usd per share) | $ 0.84 | $ 0.52 | $ 0.02 | $ 0.41 | $ 1.96 | $ 0.68 | $ (0.10) | $ (0.51) | $ 1.81 | $ 2.03 | $ 2.70 |
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- Definition Total costs of sales and operating expenses for the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of income (loss) from a discontinued operation attributable to the parent. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The aggregate amount of income or expense from ancillary business-related activities (that is to say, excluding major activities considered part of the normal operations of the business). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of other than temporary impairment losses on investments in debt and equity securities categorized as Available-for-sale which have been recognized in earnings during the period. Such impairment losses consist of other than temporary impairments (OTTI) on equity securities, credit losses on investments in debt securities, and when the entity intends to sell an impaired debt security or it is more likely than not that the entity will be required to sell the impaired debt security before recovery of its amortized cost basis. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of preferred stock dividends that is an adjustment to net income apportioned to common stockholders. No definition available.
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- References No definition available.
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