Stock-based Compensation (Textual) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended				12 Months Ended										1 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Mar. 31, 2010 2010 Plan [Member]	Dec. 31, 2013 Incentive Stock Options [Member]	Dec. 31, 2013 Restricted stock units [Member]	Dec. 31, 2012 Restricted stock units [Member]	Dec. 31, 2011 Restricted stock units [Member]	Dec. 31, 2013 Performance Stock Units [Member]	Dec. 31, 2013 Restricted Stock [Member]	Dec. 31, 2013 Non-Statutory Stock Options [Member]	Dec. 31, 2013 Stock Options [Member]	Dec. 31, 2012 Stock Options [Member]	Dec. 31, 2011 Stock Options [Member]	Jul. 31, 2012 Chief Executive Officer [Member] Restricted Stock [Member]	Jul. 31, 2012 Chief Executive Officer [Member] Stock Options [Member]	Sep. 30, 2012 Chief Financial Officer [Member] Restricted Stock [Member]	Sep. 30, 2012 Chief Financial Officer [Member] Stock Options [Member]	Jan. 31, 2014 Director [Member] Restricted Stock [Member]	Jan. 31, 2013 Director [Member] Restricted Stock [Member]	Jan. 31, 2014 Subsequent Event [Member] Performance Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares reserved for future issuance (shares)				1,100,000
Stock option expiration period (in years)	10 years
Option price as a percent of common stock (percent)					100.00%						85.00%
Percent of voting interests (percent)												10.00%
Purchase price of common stock when voting percent is above minimum threshold (percent)												110.00%
Vesting period of units granted						4 years						4 years			4 years		4 years		3 years
Annual stock option vesting percentage (percent)						25.00%						25.00%			25.00%		25.00%		33.00%
Stock options granted, weighted average grant date fair value (dollars per share)						$ 1.80	$ 3.54	$ 9.54				$ 1.34	$ 1.91	$ 5.19
Unamortized compensation cost	$ 2,177					$ 3,385				$ 1,714
Unrecognized compensation cost, period for recognition (in years)	2 years 7 months 27 days					1 year 9 months 21 days				2 years 4 months 9 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Total Fair Value						726	591
Stock units granted (shares)						2,101,000	1,148,000	578,000	523,048						750,000	400,000	50,000	200,000		215,515
Estimated Performance Goal Percentage									100.00%
Share-based Compensation	4,389	5,076	9,431						298
Stock units canceled (shares)																					358,308
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number									358,308
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Share-based Awards Other than Options																				$ 500