Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Allowance for doubtful accounts	$ 4,094	$ 3,685
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	95,000,000	95,000,000
Common stock, shares issued	47,743,985	47,409,514
Common stock, shares outstanding	47,743,985	47,409,514
Preferred stock, par value	$ 0.01	$ 0.01
Treasury Stock, shares	0	0
Series A Preferred Stock [Member]
Preferred stock, shares authorized	6,000	6,000
Preferred stock, shares issued	0	0
Preferred Stock, Shares Outstanding	0	0
Series B Preferred Stock [Member]
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	0	0
Preferred Stock, Shares Outstanding	0	0