LEASES (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Leases [Line Items]
Operating lease expense	$ 19,113	$ 0	$ 0
Rental expense		23,928	$ 19,839
Operating cash outflows	17,737
Lease assets obtained during the period in exchange for lease obligations	11,637
Operating lease assets	44,372	0
Accrued liabilities	12,898	0
Operating lease liabilities	33,585	$ 0
Total operating lease liabilities	$ 46,483
Weighted-average remaining lease term (in years)	5 years 1 month 6 days
Weighted-average discount rate	3.40%
Maturities of operating lease liabilities
2020	$ 13,970
2021	11,334
2022	8,397
2023	4,527
2024	3,319
Thereafter	9,163
Total lease payments	50,710
Less imputed interest	(4,227)
Total operating lease liabilities	$ 46,483
Real estate [Member]
Leases [Line Items]
Weighted-average remaining lease term (in years)	5 years 4 months 24 days
Real estate [Member] | Maximum [Member]
Leases [Line Items]
Remaining lease term	10 years