ARLINGTON, Va.--(BUSINESS WIRE)--Graham Holdings Company (NYSE: GHC) today announced the timing and details regarding the spin-off of Cable ONE. The Graham Holdings board of directors has approved the final distribution ratio and declared a pro rata dividend of the outstanding shares of Cable ONE common stock, which will result in the complete legal and structural separation of the two companies. The distribution is subject to the satisfaction or waiver of certain conditions. On the distributio