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Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands | Jun. 30, 2018 | Dec. 31, 2017
--- | --- | ---
Receivables, reserve | $ 11 | $ 60
Other Intangible Assets, accumulated amortization | 5,489 | 5,202
Property and Equipment, accumulated depreciation | $ 75,803 | $ 70,561
Treasury Stock, Shares | 8,742,294 | 8,405,003
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

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