Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data	Sep. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 1,500	$ 1,700
Common Stock, no par value
Common Stock, shares authorized	40,000,000	40,000,000
Common Stock, shares issued	24,366,000	24,235,000
Common Stock, shares outstanding	24,366,000	24,235,000