Income Taxes (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
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	1.20%	2.50%	1.20%	3.70%
Taxes on foreign earnings	(9.30%)	(6.60%)	(8.90%)	(7.70%)
Credits and net operating loss utilization	(0.60%)	(2.20%)	(0.80%)	(3.00%)
Purchased intangible assets	0.70%	1.90%	1.10%	1.60%
Manufacturing deduction	(2.00%)	(2.50%)	(1.90%)	(8.00%)
Permanent items	0.40%	(0.30%)	0.40%	1.00%
Other	(1.20%)	(0.40%)	(0.30%)	(0.10%)
Effective tax rate	24.20%	27.40%	25.80%	22.50%