Equity Based Compensation (Details 1) (USD $) In Thousands, except Share data, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Summary of option activity for stock options
Outstanding at January 1, 2012, Shares	796,500
Granted, Shares	0
Exercised, Shares	(34,000)
Outstanding at June 30, 2012, Shares	762,500	796,500
Exercisable on June 30, 2012, Shares	569,161
Expected to vest June 30, 2012, Shares	183,672
Outstanding at January 1, 2012, Weighted Average Exercise Price	$ 12.20
Granted, Weighted Average Exercise Price
Exercised, Weighted Average Exercise Price	$ 8.69
Forfeited, Weighted Average Exercise Price
Outstanding at June 30, 2012, Weighted Average Exercise Price	$ 12.35	$ 12.20
Exercisable on June 30, 2012, Weighted Average Exercise Price	$ 13.74
Expected to vest June 30, 2012, Weighted Average Exercise Price	$ 8.28
Outstanding, Weighted Average Remaining Contractual Life (Yrs.)	6 years 3 months 22 days	6 years 11 months 5 days
Exercisable on June 30, 2012, Weighted Average Remaining Contractual Life (Yrs.)	5 years 8 months 9 days
Expected to vest June 30, 2012, Weighted Average Remaining Contractual Life (Yrs.)	8 years 1 month 21 days
Exercised, Aggregate Intrinsic Value	$ 198
Outstanding at June 30, 2012, Aggregate Intrinsic Value	3,522
Exercisable on June 30, 2012, Aggregate Intrinsic Value	2,547
Expected to vest June 30, 2012, Aggregate Intrinsic Value	$ 975