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LEASES - Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 3,657	$ 7,155
Operating cash flows from finance leases	159	318
Financing cash flows from finance leases	98	196
Right-of-use assets obtained in exchange for lease obligations - operating leases	8,052	87,641
Right-of-use assets obtained in exchange for lease obligations - finance leases	$ 0	$ 0

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Cash Flow, Operating And Financing Activities, Lessee [Abstract]

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Amount of interest paid on finance lease liability.

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Amount of cash outflow for principal payment on finance lease.

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Amount of cash outflow from operating lease, excluding payments to bring another asset to condition and location necessary for its intended use.

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