Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Condensed Consolidated Balance Sheets [Abstract]
Allowance for doubtful accounts	$ 2,452	$ 3,000
Common Stock, par value
Common Stock, shares authorized	40,000	40,000
Common Stock, shares issued	25,623	24,931
Common Stock, shares outstanding	25,623	24,931