Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Loss Carryforwards [Line Items]
Valuation allowance	$ (16,673)		$ (15,167)	$ (16,673)	$ (15,167)
Decrease in unrecognized tax benefits for closed tax years		$ 20,300		14,064	11,465
Unrecognized tax benefits offsetting against short-term tax assets	25,400			25,400
Income tax (benefit) expense				(7,484)	$ 23,983	$ 48,367
Research
Operating Loss Carryforwards [Line Items]
Undistributed earnings from foreign subsidiaries	2,330,000			2,330,000
Tax credit carryforward	65,600			65,600
Income tax (benefit) expense	19,200		$ 12,300
United States
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	113,100			113,100
Foreign jurisdictions
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards	$ 32,300			$ 32,300