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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	(13) Subsequent Events: In July 2019, the Company withdrew $11,127 from the Arbiter Partners LP, a limited partnership, which liquidated the Company's investment in this limited partnership. On August 6, 2019, the Company's Board of Directors declared a regular quarterly dividend of $0.10 per share on the Company's Class A and Class B Common Stock. The dividend per share will be payable September 3, 2019 to shareholders of record on August 20, 2019. Pursuant to the Rule 10b5-1 plan entered into on June 21, 2019, the Company paid $2,565 to repurchase 158 shares of Class A and 152,593 shares of Class B Common Stock between July 1, 2019 and the date of this Quarterly Report on Form 10-Q.