Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]
Allowance for doubtful accounts	$ 2,001	$ 3,000
Common Stock, par value
Common Stock, shares authorized	40,000	40,000
Common Stock, shares issued	25,686	24,931
Common Stock, shares outstanding	25,686	24,931