Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Income Taxes [Line Items]
Non-cash income tax expense	$ 4.1	$ 4.1
Termination of tax holiday	2019
Net operating loss, Federal purposes	1.0
Net operating loss, State purposes	3.7
Valuation allowance for net operating losses carry-forward	2.0
Increase in valuation allowance relating to acquisition	5.0
Amount of income taxes on undistributed earnings	61.1
Payment of interest and penalties accrued	0.1	0.1	0.1
General Business Credit Carry-Forwards [Member]
Income Taxes [Line Items]
Tax credit carry-forwards	33.4
United States [Member]
Income Taxes [Line Items]
Valuation allowance for tax credit carry-forward	20.9
Foreign [Member]
Income Taxes [Line Items]
Tax credit carry-forwards	48.1
Valuation allowance for net operating losses carry-forward	6.0
Maximum [Member] | General Business Credit Carry-Forwards [Member]
Income Taxes [Line Items]
Tax credit expiration dates	2031
Maximum [Member] | Foreign [Member]
Income Taxes [Line Items]
Tax credit expiration dates	2021
Minimum [Member] | General Business Credit Carry-Forwards [Member]
Income Taxes [Line Items]
Tax credit expiration dates	2018
Minimum [Member] | Foreign [Member]
Income Taxes [Line Items]
Tax credit expiration dates	2016
Canada [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	0.7
Malaysia [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	0.1
Netherlands [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	0.5
Japan [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	3.7
Increase (decrease) in valuation allowance for net operating losses carry-forward	0.8
Singapore [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	3.5
Increase (decrease) in valuation allowance for net operating losses carry-forward	0.8
United Kingdom [Member]
Income Taxes [Line Items]
Net operating loss, Foreign	$ 23.0