Equity Based Compensation (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Summary of option activity for stock options
Outstanding at January 1, 2013, Shares	747,500
Outstanding at January 1, 2013, Weighted Average Exercise Price	$ 12.32
Outstanding at January 1, 2013, Weighted Average Remaining Contractual Life (Yrs.)	6 years 1 month 2 days		5 years 11 months 1 day
Outstanding at January 1, 2013, Aggregate Intrinsic Value
Granted, Shares	0	0
Granted, Weighted Average Exercise Price
Granted, Weighted Average Remaining Contractual Life (Yrs)
Granted, Aggregate Intrinsic Value
Exercised, Shares
Exercised, Weighted Average Exercise Price
Exercised, Aggregate Intrinsic Value
Expired, Shares
Expired, Weighted Average Exercise Price
Forfeited, Shares	(50,000)
Forfeited, Weighted Average Exercise Price	$ 21.79
Outstanding at March 31, 2013, Shares	697,500		747,500
Outstanding at March 31, 2013, Weighted Average Exercise Price	$ 11.64		$ 12.32
Outstanding at March 31, 2013, Weighted Average Remaining Contractual Life (Yrs.)	6 years 1 month 2 days		5 years 11 months 1 day
Outstanding at March 31, 2013, Aggregate Intrinsic Value	5,857
Exercisable on March 31, 2013, Shares	641,662
Exercisable on March 31, 2013, Weighted Average Exercise Price	$ 12.03
Exercisable on March 31, 2013, Weighted Average Remaining Contractual Life (Yrs.)	5 years 11 months 1 day
Exercisable on March 31, 2013, Aggregate Intrinsic Value	5,244
Expected to vest March 31, 2013, Shares	53,244
Expected to vest March 31, 2013, Weighted Average Exercise Price	$ 7.14
Expected to vest March 31, 2013, Weighted Average Remaining Contractual Life (Yrs.)	8 years 4 days
Expected to vest March 31, 2013, Aggregate Intrinsic Value	$ 585