Income Taxes (Effective Income Tax Rates Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Statutory tax rate	35.00%	35.00%	35.00%
State income taxes, net of federal benefit	0.40%	0.80%	0.60%
Uncertain tax matters	3.50%	0.20%	0.00%
Other permanent differences	(0.50%)	(1.00%)	(5.00%)
Other	(2.00%)	(1.80%)	0.30%
Effective tax rate from ongoing operations	9.60%	9.50%	4.80%
Effective tax rate after discrete items	9.60%	2.90%	1.10%
Release of valuation allowance [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Discrete Items	0.00%	(9.00%)	(3.70%)
Windfall expense related to stock compensation [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Discrete Items	0.00%	2.60%	0.00%
Enhanced R&D deduction - foreign operations [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Discrete Items	0.00%	(0.20%)	0.00%
Singapore [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Tax impact of foreign subsidiaries (primarily in Singapore)	(8.10%)	(5.60%)	(2.50%)
India [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Tax holiday - India (Permanent Difference)	(15.60%)	(15.10%)	(19.90%)
Sweden [Member]
Schedule Of Effective Income Tax Rates Reconciliation [Line Items]
Passive income exemption - Sweden (Permanent Difference)	(3.10%)	(3.00%)	(3.70%)