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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Statement Of Financial Position [Abstract]    
Allowance for accounts receivable $ 2,065 $ 2,064 [1]
Preferred stock, par value $ 0.01 $ 0.01 [1]
Preferred stock, shares authorized 2,000,000 2,000,000 [1]
Preferred stock, shares issued       [1]
Common stock, par value $ 0.01 $ 0.01 [1]
Common stock, shares authorized 40,000,000 40,000,000 [1]
Common stock, shares issued 26,621,103 26,597,753 [1]
Treasury stock, shares 5,934,651 5,934,651 [1]
[1] The consolidated balance sheet at December 31, 2012, as presented, is derived from the audited consolidated financial statements at that date.