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LEASES - Cash Flow Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]        
Cash paid for long- and short-term leases $ 2,462,000 $ 2,029,000 $ 4,250,000 $ 3,717,000
Operating lease right-of-use assets obtained in exchange for new lease obligations 156,000 0 860,000 15,132,000
ROU assets obtained in exchange for existing lease obligations     $ 14,100,000  
New ROU assets obtained in exchange for existing lease obligations $ 0 $ 0   $ 1,100,000