Condensed Consolidated Balance Sheets Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Allowance for doubtful accounts	$ 3,937	$ 4,105
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	95,000,000	95,000,000
Common stock, shares issued	46,797,466	46,105,076
Common stock, shares outstanding	46,797,466	46,105,076
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	5,064	5,064
Preferred Stock, Shares Outstanding	5,064	5,064
Series B Preferred Stock [Member]
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued	4,155	4,155
Preferred Stock, Shares Outstanding	4,155	4,155