Stock-Based Compensation (Details) - Summary of Restricted Stock Units Activity (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Summary of Restricted Stock Units Activity [Abstract]
Awards outstanding at December 31, 2013	1,478,447
Restricted stock units granted	470,853	338,000
Restricted stock units settled by delivery of common stock upon vesting	(262,091)	(514,000)
Restricted stock units cancelled	0
Awards outstanding at March 31, 2014	1,687,209
Awards outstanding at March 31, 2014 (in Dollars)	$ 4,420
Awards outstanding at March 31, 2014	3 years 156 days
Awards vested and expected to vest at March 31, 2014	1,623,084
Awards vested and expected to vest at March 31, 2014 (in Dollars)	$ 4,252
Awards vested and expected to vest at March 31, 2014	3 years 109 days