Quarterly report pursuant to Section 13 or 15(d)

Fair Value, Option, Quantitative Disclosures (Details)

v3.8.0.1
Fair Value, Option, Quantitative Disclosures (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income $ 4,992 $ 15,083
Change in fair value due to credit risk 37 411
Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 4,369 298
Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 44,667
Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 623 1,859
Change in fair value due to credit risk 37 411
Collateralized Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 (31,741)
Interest Income [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income (1,682) 4,936
Interest Income [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income (1,989) (1,704)
Interest Income [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 31,628
Interest Income [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 307 398
Interest Expense [Member] | Collateralized Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 (25,386)
Gain (Loss) on Investment Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 6,358 2,002
Gain (Loss) on Investment Securities [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 6,358 2,002
Gain (Loss) on Investment Securities [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 0
Gain (Loss) on Investment Securities [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 0
Gain (Loss) on Investment Securities [Member] | Collateralized Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 0
Other Income (Loss) [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 316 8,145
Other Income (Loss) [Member] | Available-for-sale Securities [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 0
Other Income (Loss) [Member] | Loans Held-for-Investment, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 0 13,039
Other Income (Loss) [Member] | Loans Held-for-Sale, Residential Mortgages [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income 316 1,461
Other Income (Loss) [Member] | Collateralized Borrowings [Member]    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Total included in net income $ 0 $ (6,355)