Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
CURRENT ASSETS:
Allowances for doubtful accounts	$ 1,807	$ 3,925
SHAREHOLDERS' EQUITY:
Preferred stock, par value
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	61,742,146	61,604,160
Common stock, shares outstanding	61,742,146	61,604,160