Stock Compensation - Stock Option Activity (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Stock Options, Outstanding [Roll Forward]
Outstanding as of December 31, 2013 (shares)	133,578
Granted (shares)	0
Exercised (shares)	(675)
Canceled (shares)	(532)
Outstanding as of March 31, 2014 (shares)	132,371
Vested or expected to vest at March 31, 2014 (shares)	122,120
Exercisable at March 31, 2014 (shares)	89,416
Stock Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Outstanding as of December 31, 2013, Weighted Average Exercise Price (dollars per share)	$ 17.57
Granted, Weighted Average Exercise Price (dollars per share)	$ 0.00
Exercised, Weighted Average Exercise Price (dollars per share)	$ 11.20
Canceled, Weighted Average Exercise Price (dollars per share)	$ 26.40
Outstanding as of March 31, 2014, Weighted Average Exercise Price (dollars per share)	$ 17.57
Vested and expected to vest at March 31, 2014, Weighted Average Exercise Price (dollars per share)	$ 17.64
Exercisable at March 31, 2014, Weighted Average Exercise Price (dollars per share)	$ 17.54
Stock Options, Additional Disclosures [Abstract]
Outstanding as of March 31, 2014, Weighted-Average Remaining Contractual Term (in years)	7 years 2 months 12 days
Vested and expected to vest at March 31, 2014, Weighted-Average Remaining Contractual Term (in years)	7 years 1 month 6 days
Exercisable at March 31, 2014, Weighted-Average Remaining Contractual Term (in years)	6 years 6 months
Outstanding as of March 31, 2014, Aggregate Intrinsic Value	$ 43
Vested and expected to vest at March 31, 2014, Aggregate Intrinsic Value	43
Exercisable at March 31, 2014, Aggregate Intrinsic Value	$ 42