Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 3,202	$ 2,723
Property and equipment, accumulated depreciation	43,329	41,486
Intangible assets, accumulated amortization	$ 8,625	$ 5,864
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	17,281,880	17,152,743
Common stock, shares outstanding	15,622,889	15,493,752
Treasury stock, shares outstanding	1,658,991	1,658,991