Income Taxes (Schedule of Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Taxes [Abstract]
Federal statutory tax rate	35.00%	35.00%	35.00%
Research and development tax credit	14.60%	(3.50%)
State government grants, net of federal tax impact	4.20%	(0.10%)	(0.30%)
Valuation allowance, state government grants, net of federal impact	(15.00%)
Domestic manufacturing deduction		2.70%
State income taxes, net of federal impact	1.40%	(4.00%)	1.60%
Other, net	(2.10%)	0.10%	0.10%
Effective income tax rate	38.10%	30.20%	36.40%