Income Taxes Income Tax Expense (Details) - USD ($) $ 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
Income Tax Disclosure [Abstract]
Deferred tax asset, deduction limitation	$ 2,400								$ 2,400
Operating Loss Carryforwards	1,800								1,800
Current tax expense/(benefit)
Federal									421	$ 1,268	$ (635)
State and local									2,034	1,972	313
Foreign									428	262	348
Total									2,883	3,502	26
Deferred tax expense/(benefit)
Federal									44,071	(22,834)	(37,979)
Foreign									(2,938)	(1,900)	(7,420)
Foreign									37	2,140	(2,123)
Total									(41,170)	22,594	47,522
Total Tax expense/(benefit)	40,646	$ 2,281	$ (785)	$ 1,911	$ (12,539)	$ 8,759	$ (11,992)	$ (3,320)	44,053	(19,092)	(47,496)
Income (Loss) from Continuing Operations before Income Taxes, Domestic									3,900	(29,500)	8,000
Income (Loss) from Continuing Operations before Income Taxes, Foreign									3,100	(2,000)	3,500
Unrecognized Tax Benefits	3,947				$ 0				3,947	$ 0	$ 0
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	1,100								1,100
Unrecognized Tax Benefits, Interest on Income Taxes Expense									300
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 1,500								1,500
Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit)									$ 46,600