Income Taxes Unrecognized Tax Benefits (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	Dec. 31, 2013
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Expense									$ 5,700	$ 3,500
Unrecognized Tax Benefits	$ 85,762				$ 78,079				85,762	78,079	$ 81,459	$ 1,539
Unrecognized Tax Benefits, Additions Based on Tax Positions Related to Current Year									3,546	3,608	10,132
Unrecognized Tax Benefits, Additions for Tax Positions of Prior Years									4,706	1,570	71,327
Unrecognized Tax Benefits, Reductions for Tax Positions of Prior Years									(569)	(8,558)	(1,539)
Income Tax Expense (Benefit)	$ (490)	$ 1,845	$ 1,077	$ 1,082	$ 208	$ (165)	$ 1,153	$ 2	3,514	1,200	4,020
Interest on Prior Year Income Tax Expense [Member]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]
Income Tax Expense (Benefit)									$ 2,200	$ 400	$ 3,100