Condensed Consolidated Balance Sheets (Unaudited) (Paranthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2011
CURRENT ASSETS:
Allowance for Doubtful Accounts Receivable	$ 1,750	$ 1,750
SHAREHOLDERS’ EQUITY:
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	100,000	100,000
Common stock, shares issued	69,350	69,118
Common Stock, Shares, Outstanding	40,940	45,548
Preferred Stock, Par or Stated Value Per Share	$ 0.10	$ 0.10
Preferred Stock, Shares Authorized	14,399	14,399
Preferred Stock, Shares Issued	0	0
Preferred Stock, Shares Outstanding	0	0
Treasury stock, 25,957 and 23,570 shares of common held at cost	28,410	23,570