Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
Statutory rate	35.00%	35.00%	35.00%	35.00%
State taxes	2.50%	0.80%	3.70%	0.80%
Taxes on foreign earnings	(6.60%)	(7.10%)	(7.70%)	(7.60%)
Credits and net operating loss utilization	(2.20%)	(3.40%)	(3.00%)	(3.70%)
Purchased intangible assets	1.90%	1.30%	1.60%	1.20%
Manufacturing deduction	(2.50%)	(2.50%)	(8.00%)	(2.30%)
Permanent items	(0.30%)	0.40%	1.00%	(0.40%)
Other	(0.40%)	0.20%	(0.10%)	0.50%
Effective tax rate	27.40%	24.70%	22.50%	23.50%