CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) (USD $) In Thousands, except Share data	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Allowance for Doubtful Accounts Receivable, Current	$ 3,753	$ 2,810
Stockholders' Equity
Preferred Stock, Par or Stated Value Per Share	$ 1.00	$ 1.00
Preferred Stock, Shares Authorized	250,000	250,000
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Common Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Common Stock, Shares Authorized	100,000,000	100,000,000
Common Stock, Shares, Outstanding	61,976,227	61,592,135
Treasury Stock, Shares	2,008,986	2,008,986