Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Accounts receivable, allowance	$ 11,497	$ 11,106
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, Authorized shares	10,000	10,000
Preferred stock, shares issued
Preferred stock, shares outstanding
Common stock, par value	$ 0.01	$ 0.01
Common stock, Authorized shares	100,000	100,000
Common stock, issued	17,679	17,844
Common stock, outstanding	17,679	17,844