Stock-Based Compensation (Details 12)	12 Months Ended
	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum shares authorized	24,300,000
Shares available for future issuance	3,800,000
2012 Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Offering periods	3 months
Purchase price	95.00%
Maximum shares authorized	2,500,000
Employee purchased shares	20,500
Shares available for future issuance	2,500,000