Condensed Consolidated Balance Sheets Parenthetical (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	30,000,390	29,612,684
Common stock, shares outstanding	30,000,390	29,612,684
Allowance for Doubtful Accounts Receivable, Current	$ 4,402	$ 2,360