Income Taxes (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Taxes [Line Items]
Discrete Income Tax Expense Benefit	$ (1,227,000)	$ 0	$ 0
Net changes in the total valuation allowance	6,400,000	(11,500,000)	(700,000)
Established valuation allowance for acquired deferred tax assets		4,600,000
Cumulative undistributed earnings	717,000,000
Income tax incentives	12,721,000	8,842,000	8,035,000
Net impact of holiday tax incentives, per diluted share	$ 0.23	$ 0.16	$ 0.14
Unrecognized tax benefits including interest and penalties	18,000,000
Interest on unrecognized tax	1,700,000
Penalty on unrecognized tax	1,600,000
Interest and penalties included in income tax expense	100,000
U.S. Federal [Member]
Income Taxes [Line Items]
Net changes in the total valuation allowance		17,500,000
Operating loss carryforwards	73,600,000
Tax credit carryforwards	5,500,000
Tax credit carryforwards expiration dates	2031
State and local [Member]
Income Taxes [Line Items]
Operating loss carryforwards	84,400,000
Tax credit carryforwards	1,600,000
Tax credit carryforwards expiration dates	2027
Foreign [Member]
Income Taxes [Line Items]
Operating loss carryforwards	14,400,000
Indefinite carryforward	31,000,000
Operating loss carryforwards expiration dates	2024
Minimum [Member] | U.S. Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2022
Minimum [Member] | State and local [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2017
Maximum [Member] | U.S. Federal [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2034
Maximum [Member] | State and local [Member]
Income Taxes [Line Items]
Operating loss carryforwards expiration dates	2031
CHINA
Income Taxes [Line Items]
Income tax incentives	2,800,000	0	2,449,000
Income tax reconciliation tax holidays expiration date	2015
MALAYSIA
Income Taxes [Line Items]
Income tax incentives	2,299,000	1,559,000	992,000
Income tax reconciliation tax holidays expiration date	2016
THAILAND
Income Taxes [Line Items]
Income tax incentives	$ 7,622,000	$ 7,283,000	$ 4,594,000
Income tax reconciliation tax holidays expiration date	2026