Stock-Based Compensation Summary of Stock Option Activity (Details) (USD $)	3 Months Ended
	Mar. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Weighted Average Remaining Contractual Term	5 years 5 months 9 days
Options Exercisable, Weighted Average Remaining Contractual Term	3 years 11 months 23 days
Share-based Compensation awards, time-based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Beginning Balance (in shares)	2,016,231
Options Outstanding, Weighted Average Exercise Price, Beginning Balance (in dollars per share)	4.38
Options Exercisable, Beginning Balance (in shares)	1,690,040
Options Exercisable, Weighted Average Exercise Price, Beginning Balance (in dollars per share)	3.66
Granted (in shares)	0
Granted, Weighted Average Exercise Price (in dollars per share)	0.00
Vested (in shares)	8,642
Vested, Weighted Average Exercise Price (in dollars per share)	9.86
Exercised (in shares)	0
Exercised, Weighted Average Exercise Price (in dollars per share)	0.00
Canceled/forfeited (in shares)	(18,750)
Canceled/forfeited, Weighted Average Exercise Price (in dollars per share)	7.84
Options Outstanding, Ending Balance (in shares)	1,997,481
Options Outstanding, Weighted Average Exercise Price, Ending Balance (in dollars per share)	4.35
Options Exercisable, Ending Balance (in shares)	1,698,682
Options Exercisable, Weighted Average Exercise Price, Ending Balance (in dollars per share)	3.69
Options Outstanding, Weighted Average Remaining Contractual Term	4 years 8 months 12 days
Options Exercisable, Weighted Average Remaining Contractual Term	4 years
Share-based Compensation awards, performanced-based [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options Outstanding, Beginning Balance (in shares)	185,000
Options Outstanding, Weighted Average Exercise Price, Beginning Balance (in dollars per share)	8.00
Options Exercisable, Beginning Balance (in shares)	0
Options Exercisable, Weighted Average Exercise Price, Beginning Balance (in dollars per share)	0.00
Granted (in shares)	228,981
Granted, Weighted Average Exercise Price (in dollars per share)	8.89
Exercised (in shares)	0
Exercised, Weighted Average Exercise Price (in dollars per share)	0.00
Canceled/forfeited (in shares)	49,168
Canceled/forfeited, Weighted Average Exercise Price (in dollars per share)	8.62
Options Outstanding, Ending Balance (in shares)	364,813
Options Outstanding, Weighted Average Exercise Price, Ending Balance (in dollars per share)	8.48
Options Exercisable, Ending Balance (in shares)	0
Options Exercisable, Weighted Average Exercise Price, Ending Balance (in dollars per share)	0.00
Options Outstanding, Weighted Average Remaining Contractual Term	9 years 6 months
Options Exercisable, Weighted Average Remaining Contractual Term	0 years
Subsequent Event [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years