Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,516	$ 2,465
Preferred Stock Par or Stated Value per Share	$ 0.01	$ 0.01
Preferred Stock Shares Authorized	5,000	5,000
Preferred Stock Shares Issued	0	0
Preferred Stock Shares Outstanding	0	0
Common Stock Par or Stated Value per Share	$ 0.01	$ 0.01
Common Stock Shares Authorized	180,000	180,000
Common Stock Shares Issued	13,131	12,646
Common Stock Shares Outstanding	13,131	12,646