Balance Sheet (Parenthetical) (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 2,527	$ 2,198
Preferred Stock Shares Authorized	5,000
Preferred Stock Shares Outstanding	0
Common Stock Shares Authorized	180,000
Common Stock Shares Outstanding	12,646	12,179