Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 1,252	$ 929
Property and equipment, accumulated depreciation	35,153	31,657
Intangible assets, accumulated amortization	$ 1,633	$ 826
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	16,886,063	16,563,836
Common stock, shares outstanding	15,227,072	14,904,845
Treasury stock, shares outstanding	1,658,991	1,658,991