UNAUDITED CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Accounts receivable, allowance for doubtful accounts (in dollars)	$ 1,947	$ 1,668
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized	20,000	20,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized	120,000	120,000
Common stock, shares outstanding	53,207	52,528
Treasury stock, shares	240	231
Term Loan Current
Term loan, discount (in dollars)	203	206
Term Loan Noncurrent
Term loan, discount (in dollars)	$ 267	$ 367