Income Taxes (Narrative) (Details) (USD $)	3 Months Ended	12 Months Ended			3 Months Ended
	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014
Operating Loss Carryforwards [Line Items]
Valuation allowance		$ (15,167,000)	$ (26,465,000)		$ (15,167,000)
Decrease in unrecognized tax benefits for closed tax years	9,300,000	11,465,000	2,301,000
Unrecognized tax benefits offsetting against short-term tax assets		6,300,000			6,300,000
Unrecognized tax benefits offsetting against long-term tax assets		21,900,000			21,900,000
Interest on tax positions		800,000
Accrued interest on tax positions		0			0
Income taxes		23,983,000	48,367,000	57,682,000
Research
Operating Loss Carryforwards [Line Items]
Undistributed earnings from foreign subsidiaries		2,090,000,000			2,090,000,000
Income taxes					12,300,000
Tax credit carryforward		65,300,000			65,300,000
United States
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards		162,500,000			162,500,000
Foreign jurisdictions
Operating Loss Carryforwards [Line Items]
Net operating loss carry forwards		$ 37,700,000			$ 37,700,000