Income Taxes Income Tax Expense Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate	35.00%		35.00%		35.00%
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ 34,860		$ 33,990		$ 14,880
Income Tax Reconciliation, State and Local Income Taxes	2,750		250		730
Income Tax Reconciliation, Foreign Income Tax Rate Differential	(3,910)		(8,550)		(4,920)
Income Tax Reconciliation, Tax Contingencies	(1,960)		(1,630)		(1,320)
Income Tax Reconciliation, Tax Holidays	420	[1]	1,980	[1]	1,160	[1]
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount	0		(5,460)		0
Income Tax Reconciliation, Nondeductible Expense, Restructuring Charges (Benefits)	0		2,230		(2,400)
Income Tax Reconciliation, Noncontrolling Interest Income (Expense)	(280)		(1,410)		(790)
Income Tax Reconciliation, Change in Deferred Tax Assets Valuation Allowance	3,310		1,980		1,600
Income Tax Reconciliation, Other Adjustments	(1,480)		(1,280)		(560)
Income Tax Expense (Benefit), Continuing Operations	$ 32,870		$ 18,140		$ 6,060

[1] (a) Tax holiday related to Thailand which expires on December 31, 2015.