CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
CONSOLIDATED BALANCE SHEETS
Accounts receivable, allowance (in dollars)	$ 725	$ 799
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common Stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, shares authorized	125,000,000	125,000,000
Common Stock, shares issued	89,686,170	88,341,546
Common Stock, shares outstanding	84,697,632	83,353,008
Treasury stock, shares	4,988,538	4,988,538