Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)

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CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)
In Thousands, except Share data, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
Trade accounts receivable, allowance for doubtful accounts $ 9,141 $ 9,300
Notes receivable, allowance for doubtful accounts 83 100
Property, plant and equipment, accumulated depreciation 128,337 125,708
Amortizable intangible assets, accumulated amortization $ 23,405 $ 22,817
Treasury stock, shares 2,317,650 2,317,650
Class A common Stock
   
Common stock, par value $ 0.01 $ 0.01
Common stock, authorized 80,000,000 80,000,000
Common stock, issued 21,069,038 21,051,305
Common stock, outstanding 18,751,388 18,733,655
Class B common stock
   
Common stock, par value $ 0.01 $ 0.01
Common stock, authorized 20,000,000 20,000,000
Common stock, issued 5,553,696 5,553,696
Common stock, outstanding 5,553,696 5,553,696