Income Taxes (Details 2)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Reconciliation between the U.S. federal statutory tax rate and effective tax rate
Statutory rate	35.00%	35.00%	35.00%
State taxes	1.20%	3.10%	0.90%
Taxes on foreign earnings	(9.50%)	(6.70%)	(6.20%)
Credits and net operating loss utilization	(1.10%)	(2.60%)	(3.50%)
Purchased intangible assets	1.20%	1.50%	1.20%
Manufacturing deduction	(1.80%)	(6.60%)	(2.10%)
Permanent items	0.50%	0.80%	(0.40%)
Contingent consideration	(0.40%)	0.00%	0.50%
Other	0.00%	(0.30%)	0.00%
Effective tax rate	25.10%	24.20%	25.40%