Annual report pursuant to Section 13 and 15(d)

Schedule of Components of Income Tax Expense (Benefit) (Details)

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Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Income Tax Expense (Benefit) Components [Line Items]                      
Current Federal Tax Expense (Benefit)                 $ (4,027) $ 6,507 $ 808
Current State and Local Tax Expense (Benefit)                 175 16 5
Current Income Tax Expense (Benefit)                 (3,852) 6,523 813
Deferred Income Tax Expense (Benefit)                 (12,638) (80,261) 83,598
Income Tax Expense (Benefit) $ 8,780 $ (7,656) $ (6,957) $ (10,657) $ (11,718) $ (4,858) $ (23,260) $ (33,902) $ (16,490) $ (73,738) $ 84,411