Stock-Based Employee Compensation (Details 2) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Stock Options [Member]
Outstanding stock options
Exercise Price	$ 2.30
Shares, Outstanding	258,723
Weighted-Average Life (Years), Outstanding	5 years 11 months 1 day
Intrinsic Values, Outstanding	$ 1,586
Weighted-Average Exercise Price, Exercisable	$ 2.30
Shares, Exercisable	194,042
Intrinsic Values Exercisable, at stock option plan exercise price	1,189
Stock Options Two [Member]
Outstanding stock options
Exercise Price	$ 5.77
Shares, Outstanding	31,923
Weighted-Average Life (Years), Outstanding	3 years 11 months 1 day
Intrinsic Values, Outstanding	85
Weighted-Average Exercise Price, Exercisable	$ 5.77
Shares, Exercisable	31,923
Intrinsic Values Exercisable, at stock option plan exercise price	85
Stock Options Three [Member]
Outstanding stock options
Exercise Price	$ 5.85
Shares, Outstanding	142,382
Weighted-Average Life (Years), Outstanding	4 years 9 months 29 days
Intrinsic Values, Outstanding	367
Weighted-Average Exercise Price, Exercisable	$ 5.85
Shares, Exercisable	142,382
Intrinsic Values Exercisable, at stock option plan exercise price	367
Stock Options Four [Member]
Outstanding stock options
Shares, Outstanding	433,028
Weighted-Average Life (Years), Outstanding	5 years 4 months 28 days
Intrinsic Values, Outstanding	2,038
Weighted-Average Exercise Price, Exercisable	$ 3.72
Shares, Exercisable	368,347
Intrinsic Values Exercisable, at stock option plan exercise price	$ 1,641