Condensed Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 4,487	$ 4,338
Preferred stock, shares authorized	250	250
Common stock, shares authorized	50,000	50,000
Common stock, shares issued	17,857	17,948