Stock-Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended				1 Months Ended
	Mar. 31, 2014 Stock Options	Mar. 31, 2013 Stock Options	Mar. 31, 2014 Restricted Stock Units	Mar. 31, 2013 Restricted Stock Units	Mar. 31, 2014 Restricted stock units granted in March 2014
Stock-Based Compensation
Granted (in shares)	0	0
Recognized stock-based compensation expense	$ 0	$ 0	$ 796	$ 1,042
Unrecognized compensation costs related to unvested options	0
Units granted (in shares)					7,518
Vested (in shares)			0	5,000
Forfeited (in shares)			0	0
Unrecognized stock-based compensation costs			$ 6,654
Weighted average remaining recognition period of unrecognized stock-based compensation costs			3 years 10 months 24 days