CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Allowance for Doubtful Accounts Receivable (in dollars)	$ 607	$ 788
Common Stock, Par Value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	300,000,000	300,000,000
Common Stock, Shares Issued	162,127,000	160,708,000
Common Stock, Shares Outstanding	159,747,000	158,628,000
Treasury Stock, Shares	2,380,000	2,080,000