Corporate Income Taxes - Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current
Federal	$ (3,100)	$ 12,454	$ 396
Foreign	67	183	232
State and Local	197	266	175
Total	(2,836)	12,903	803
Deferred
Federal	(8,262)	14,684	6,487
Foreign	0	0	0
State and Local	(3,253)	25,024	77
Total	(11,515)	39,708	6,564
Federal income tax expense (benefit)	(11,362)	27,138	6,883
Foreign income tax expense (benefit)	67	183	232
State and local income tax expense (benefit)	(3,056)	25,290	252
Income tax expense (benefit)	$ (14,351)	$ 52,611	$ 7,367