CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS    
Accounts receivable, allowances (in dollars) $ 2,786 $ 2,499
Other current assets, restricted cash (in dollars) 1,932 1,917
Other non-current assets, restricted cash (in dollars) $ 4,005 $ 4,178
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, Authorized shares 15,000 15,000
Preferred stock, issued shares 0 0
Preferred stock, outstanding shares 0 0
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, Authorized shares 200,000 200,000
Common stock, issued shares 29,173 29,163
Common stock, outstanding shares 27,669 27,659