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Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Receivables, reserve $ 1 $ 59
Other intangible assets, accumulated amortization 21,420 21,116
Property and equipment, accumulated depreciation $ 57,924 $ 56,034
Treasury stock, shares 5,469,469 5,411,429
Class A [Member]    
Common stock, no par value $ 0 $ 0
Common stock, shares authorized 20,000 20,000
Common stock, shares issued 9,000 9,000
Common stock, shares outstanding 9,000 9,000
Class B [Member]    
Common stock, no par value $ 0 $ 0
Common stock, shares authorized 900,000,000 900,000,000
Common stock, shares issued 109,505,456 109,505,456