Stockholders' Equity (Details) - Summary of Restricted Stock Units Activity (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Summary of Restricted Stock Units Activity [Abstract]
Awards outstanding	1,478,447	913,027
Awards outstanding (in Dollars)	$ 3,341
Awards outstanding	3 years 270 days
Awards outstanding (in Dollars per share)	$ 0	$ 0
Awards vested and expected to vest at December 31, 2013	1,406,822
Awards vested and expected to vest at December 31, 2013 (in Dollars)	$ 3,179
Awards vested and expected to vest at December 31, 2013	3 years 21 days
Awards vested and expected to vest at December 31, 2013 (in Dollars per share)	$ 0
Restricted stock units granted	1,338,018	249,000	1,400,000
Restricted stock units granted (in Dollars per share)	$ 0
Restricted stock units settled by delivery of Common Stock upon vesting	(751,371)
Restricted stock units settled by delivery of Common Stock upon vesting (in Dollars per share)	$ 0
Restricted stock units cancelled	(21,227)
Restricted stock units cancelled (in Dollars per share)	$ 0