Income Taxes Deferred Tax Summary (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Net deferred tax assets	$ 0	$ 16,662
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	3,785	0
Deferred Tax Liabilities, Noncurrent	(94,657)	(112,118)
Deferred Tax Liabilities, Net	$ (90,872)	$ (95,456)