Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 947	$ 623
Property and equipment, accumulated depreciation	30,539	27,508
Intangible assets, accumulated amortization	$ 717	$ 434
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	16,524,451	16,207,268
Common stock, shares outstanding	14,865,460	14,548,277
Treasury stock, shares outstanding	1,658,991	1,658,991