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	$ 1,635	$ 1,885
Preferred stock, shares authorized	250	250
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	17,977	17,448