LEASES (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019	Jun. 30, 2019	Dec. 31, 2018
LEASES
Initial term	12 years	12 years
Operating lease cost, selling, general and administrative expenses	$ 11,298	$ 20,963
Cash flows from operating leases	$ 10,379	$ 19,473
Weighted-average discount rate	6.60%	6.60%
Weighted-average remaining lease term	7 years 4 months 24 days	7 years 4 months 24 days
Future minimum lease payments under operating leases
Six months ending December 31, 2019	$ 20,834	$ 20,834
2020	39,965	39,965
2021	33,461	33,461
2022	27,944	27,944
2023	22,854	22,854
2024 and thereafter	88,139	88,139
Total	233,197	233,197
Less: present value discount	(52,746)	(52,746)
Operating lease liabilities at June 30, 2019	180,451	180,451
Other information pertaining to leases
Operating lease costs included in selling general and administrative expenses	11,298	20,963
Operating cash flows from operating leases	10,379	19,473
Operating lease assets obtained in exchange for operating lease obligations	$ 13,469	$ 37,317
Future minimum lease payments under operating leases
2019			$ 35,426
2020			31,695
2021			24,813
2022			20,906
2023			16,743
2024 and thereafter			50,045
Total minimum lease payments			$ 179,628