Income Taxes Income Tax Expense (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current tax expense/(benefit)
Federal									$ 1,268	$ (635)	$ 2,247
State and local									1,972	313	573
Foreign									262	348	341
Total									3,502	26	3,161
Deferred tax expense/(benefit)
Federal									(22,834)	(37,979)	(99,284)
Foreign									(1,900)	(7,420)	(28,825)
Foreign									2,140	(2,123)	4
Total									22,594	47,522	128,105
Total Tax expense/(benefit)	$ (12,539)	$ 8,759	$ (11,992)	$ (3,320)	$ (52,708)	$ (5,081)	$ 3,346	$ 6,947	(19,092)	(47,496)	(124,944)
Income (Loss) from Continuing Operations before Income Taxes, Domestic									(29,500)	8,000	56,700
Income (Loss) from Continuing Operations before Income Taxes, Foreign									$ (2,000)	$ 3,500	$ 1,100