OTHER INCOME (EXPENSE) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Gain (Loss) on Sale of Investments	$ 4,695	$ 0	$ 0
Gain (Loss) on Investments	0	687	2,725
Equity investment income	2,394	3,993	3,615
Interest income	1,133	2,107	3,363
Rental Income, Nonoperating	1,697	1,804	2,372
Investment gain related to investments for deferred compensation	4,695	0	0
Other income (expense)	(393)	10,607	(2,967)
Other income	$ 9,526	$ 19,198	$ 9,108

Amount of realized and unrealized gain (loss) on investment.

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The net realized gain (loss) on investments sold during the period, not including gains (losses) on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, which, for cash flow reporting, is a component of proceeds from investing activities.

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Amount of income (loss) for proportionate share of equity method investee's income (loss).

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The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of investments, not including unrealized gains or losses on securities separately or otherwise categorized as trading, available-for-sale, or held-to-maturity, held at each balance sheet date and included in earnings for the period.

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