Income Taxes Income Taxes Details 5 (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Taxes [Abstract]
Non-current deferred tax assets	$ 861	$ 23,817
Non-current deferred tax liabilities	(454,638)	(470,584)
Net deferred income tax liability	(453,777)	(446,767)
Impact of of certain tax items	34,000	12,700
Undistributed Earnings from Foreign Subsidiaries	$ 308,600	$ 259,800