Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts	$ 511	$ 525
Common stock, par value	$ 0.04	$ 0.04
Common stock, shares authorized	240,000,000	240,000,000
Common stock, shares issued	69,678,982	69,678,982
Common stock, shares outstanding	69,669,587	69,669,587
Treasury stock, number of shares	9,395	9,395