Income Taxes (Narrative) (Details) (USD $)	12 Months Ended								12 Months Ended		12 Months Ended				12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011 Subject To Utilization Limitations [Member]	Dec. 31, 2011 Not Subject To Expiration [Member]	Dec. 31, 2011 Subject To Expiration [Member]	Dec. 31, 2011 Investments In Foreign Subsidiaries And Foreign Corporate Joint Ventures That Are Essentially Permanent In Duration [Member]	Aug. 01, 2011 Assumed In Business Combination [Member]	Dec. 31, 2011 Federal Domestic [Member]	Dec. 31, 2011 Foreign Country [Member]	Dec. 31, 2011 State And Local Jurisdiction [Member]	Dec. 31, 2011 Effective Income Tax Rate Excluding Japan Rate Change [Member]	Dec. 31, 2011 Japanese Corporate Tax Rate Change Impact [Member]	Dec. 31, 2011 Operating Loss Carryforward With No Expiration Date [Member] Foreign Country [Member]	Dec. 31, 2011 Operating Loss Carryforward Expiring Between 2019-2026 [Member] Foreign Country [Member] Subject To Expiration [Member]	Dec. 31, 2011 Subject To Utilization Limitations [Member] State And Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Amount in excess of the amount for financial reporting over the tax bases							$ 137,700,000
Net operating loss carryforwards									3,200,000	48,300,000	9,500,000			6,600,000	41,700,000	7,400,000
Net operating loss carryforwards, expiration period									2028		between 2016 and 2030				between 2019 and 2026
Tax credit carryforwards	12,800,000			8,000,000	1,300,000	11,500,000
Tax credit carryforwards, expiration period						between 2012 and 2031
Total unrecognized tax benefit that would not affect the effective tax rate, if recognized	5,800,000
Liability for penalties	2,200,000	455,000						2,100,000
Liability for interest	2,600,000	2,000,000						546,000
Years open to examination	2007 through 2010
Years under examination	2007
Foreign deferred tax expense	$ 10,061,000	$ (9,366,000)	$ (7,474,000)										$ 4,800,000
Effective tax rate	31.80%	29.20%	32.90%									30.00%