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OTHER INCOME (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Other Income and Expenses [Abstract]    
Equity investment income $ 875 $ 1,116
Gain (Loss) on Disposition of Assets 370 181
Interest income 340 617
Building rental income 255 578
Other (expense) income (844) 5,258
Nonoperating Income (Expense) $ 996 $ 7,750