LEASES - Operating Lease Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Remainder of 2019	$ 19,818
2020	22,545
2021	22,451
2022	23,165
2023	19,042
Later years	72,536
Discount	35,259
Total discounted operating lease liabilities	$ 144,298	$ 0
2019		28,240
2020		25,331
2021		27,025
2022		28,012
2023		23,801
Operating LeaLater yearsses, Future Minimum Payments, Due Thereafter		118,497
Total discounted operating lease liabilities		$ 250,906

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Amount of lessee's undiscounted obligation for lease payments for operating lease, due after fifth fiscal year following latest fiscal year.

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Amount of lessee's undiscounted obligation for lease payments for operating lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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