Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 item	Dec. 31, 2011	Dec. 31, 2010
Summary of Significant Accounting Policies
Number of reportable segments	2
Revenue Recognition
Percentage of consolidated sales attributable to broadband communication market (as a percent)	8.00%
Stock Options
Expense incurred for stock-based compensation plans (in dollars)	$ 31,412	$ 28,679	$ 25,385
Expense incurred for stock-based compensation plans, net of tax (in dollars)	22,709	20,720	18,070
Weighted-average assumptions:
Risk free interest rate (as a percent)	0.80%	1.70%	2.20%
Expected life	4 years 7 months 6 days	4 years 7 months 6 days	5 years 7 months 6 days
Expected volatility (as a percent)	30.00%	28.00%	33.00%
Expected dividend yield (as a percent)	0.80%	0.10%	0.10%
Income tax
Undistributed earnings of foreign affiliated companies	2,235,000
Research and Development
Research and development expenses for the creation of new and improved products and processes	$ 92,480	$ 88,877	$ 77,570