OTHER INCOME (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Gain (Loss) on Investments	$ 4,695	$ 0	$ 4,695	$ 0
Equity investment income	445	1,016	2,294	3,199
Building rental income	362	381	1,096	1,369
Interest income	193	456	834	1,605
Gain (Loss) on Disposition of Assets	(59)	246	708	423
Other (expense) income	(377)	5,338	(1,303)	11,068
Nonoperating Income (Expense)	$ 5,259	$ 7,437	$ 8,324	$ 17,664

Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee.

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

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

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