Income Taxes (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current:
Current Income Tax Expense (Benefit), Total	$ 89,865	$ 302,313	$ 39,865
Deferred:
Deferred Income Tax Expense (Benefit), Total	(187,903)	(239,647)	(95,046)
Total income tax expense (benefit)	(98,038)	62,666	(55,181)
United States
Current:
Federal tax	5,088	183,840	(16,934)
State	8,227	9,401	5,933
Deferred:
Federal	(182,518)	(211,119)	(71,251)
State	(7,142)	(19,401)	(13,507)
Outside the U.S
Current:
Federal tax	76,550	109,072	50,866
Deferred:
Federal	$ 1,757	$ (9,127)	$ (10,288)