LEASES - Future minimum rental payments (Details) $ in Thousands	Mar. 31, 2019 USD ($)
LEASES
2019 (remainder of year)	$ 206
2020	208
2021	136
2022	50
2023	2
Total future minimum lease payments	602
Imputed interest	(35)
Total	567
2019 (remainder of year)	29,609
2020	35,411
2021	26,294
2022	18,741
2023	12,019
2024	5,826
Thereafter	4,593
Total future minimum lease payments	132,493
Imputed interest	(15,125)
Operating Lease, Liability, Total	117,368
2019 (remainder of year)	29,815
2020	35,619
2021	26,430
2022	18,791
2023	12,021
2024	5,826
Thereafter	4,593
Total future minimum lease payments	133,095
Imputed interest	(15,160)
Total	$ 117,935