Stock-Based Compensation (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2012
Summary of non-vested stock options
Shares Forfeited	(21,876)
Restricted Stock Service Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance	8,000
Shares Granted	207,000
Shares Vested	(18,000)
Shares Forfeited	(15,000)
Non-vested Shares, Ending Balance	182,000
Weighted average fair value, Beginning Balance	11.00
Weighted average fair value, Granted	9.66
Weighted average fair value, Vested	8.72
Weighted average fair value, Forfeited	10.76
Weighted average fair value, Ending Balance	9.72
Restricted Stock Performance Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance
Shares Granted	117,000
Shares Forfeited	(7,000)
Non-vested Shares, Ending Balance	110,000
Weighted average fair value, Beginning Balance
Weighted average fair value, Granted	13.24
Weighted average fair value, Forfeited	13.24
Weighted average fair value, Ending Balance	13.24
Restricted Stock Units Service Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance
Shares Granted	54,000
Shares Forfeited	(2,000)
Non-vested Shares, Ending Balance	52,000
Weighted average fair value, Beginning Balance
Weighted average fair value, Granted	10.04
Weighted average fair value, Forfeited	11.02
Weighted average fair value, Ending Balance	10.00
Restricted Stock Units Performance Based [Member]
Summary of non-vested stock options
Non-vested Shares, Beginning Balance
Shares Granted	117,000
Shares Forfeited	(7,000)
Non-vested Shares, Ending Balance	110,000
Weighted average fair value, Beginning Balance
Weighted average fair value, Granted
Weighted average fair value, Vested
Weighted average fair value, Forfeited
Weighted average fair value, Ending Balance