Income Taxes (Reconciliation of the Company's Effective Tax Rate to the Statutory Federal Rate) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Federal statutory taxes	35.00%	35.00%	35.00%
State income taxes, net of federal tax benefit	1.20%	1.90%	1.70%
Foreign operations	(14.80%)	(10.20%)	(14.50%)
Permanent differences	(1.10%)	(2.00%)	1.20%
Tax credits	(10.90%)	(4.70%)	(7.10%)
Stock option compensation	0.40%	0.10%	0.10%
Change in accruals for uncertain tax positions	3.30%	(5.30%)	1.40%
Other	(0.60%)	(0.70%)	(0.40%)
Effective income tax rate	12.50%	14.10%	17.40%