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CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
CONSOLIDATED BALANCE SHEETS    
Accounts receivable, allowances (in dollars) $ 1,252 $ 1,305
Property and equipment, accumulated depreciation (in dollars) 108,212 88,042
Intangible assets, accumulated amortization (in dollars) $ 2,809 $ 2,558
Preferred stock, par value (in dollars per share) $ 0.01 $ 0.01
Preferred stock, authorized shares 4,000,000 4,000,000
Preferred stock, issued shares 0 0
Preferred stock, outstanding shares 0 0
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, authorized shares 100,000,000 100,000,000
Common stock, issued shares 21,132,333 20,747,161
Common stock, outstanding shares 21,132,333 20,747,161