Incentive Plan (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012
Summary of Stock Options
Outstanding, beginning of period, Number of Options Granted		787,450
Outstanding, beginning of period, Weighted Average Exercise Price		$ 14.55
Options granted, Number of Options Granted	0
Options granted, Weighted Average Exercise Price	$ 0.00
Options forfeited, Number of Options Granted	(2,000)
Options forfeited, Weighted Average Exercise Price	$ 26.84
Options exercised, Number of Options Granted	(105,700)
Options exercised, Weighted Average Exercise Price	$ 6.30
Options expired, Number of Options Granted	0
Options expired, Weighted Average Exercise Price	$ 0.00
Outstanding, end of period, Number of Options Granted	679,750	679,750
Outstanding, end of period, Weighted Average Exercise Price	$ 15.79	$ 15.79
Outstanding, end of period, Weighted Average Remaining Contractual Term (Years)		2 years 9 months 26 days
Outstanding, end of period, Aggregate Intrinsic Value	$ 1,754	$ 1,754
Exercisable, end of period, Number of Options Granted	679,750	679,750
Exercisable, end of period, Weighted Average Exercise Price	$ 15.79	$ 15.79
Exercisable, end of period, Weighted Average Remaining Contractual Term (Years)		2 years 9 months 26 days
Exercisable, end of period, Aggregate Intrinsic Value	1,754	1,754
Vested or expected to vest, end of period, Number of Options Granted	679,750	679,750
Vested or expected to vest, end of period, Weighted Average Exercise Price	$ 15.79	$ 15.79
Vested or expected to vest, end of period, Weighted Average Remaining Contractual Term (Years)		2 years 9 months 26 days
Vested or expected to vest, end of period, Aggregate Intrinsic Value	$ 1,754	$ 1,754