LEASES - Maturities of Leases, Prior to the Adoption of ASU 2016-02 (Details) $ in Thousands	Dec. 31, 2018 USD ($)
Operating leases
Operating leases, Total future minimum lease payments, 2019	$ 8,934
Operating leases, Total future minimum lease payments, 2020	7,143
Operating leases, Total future minimum lease payments, 2021	6,252
Operating leases, Total future minimum lease payments, 2022	4,797
Operating leases, Total future minimum lease payments, 2023	3,320
Operating leases, Total future minimum lease payments, After 2023	7,470
Total future minimum lease payments	37,916
Finance leases
Finance leases, Total future minimum lease payments, 2019	679
Finance leases, Total future minimum lease payments, 2020	311
Finance leases, Total future minimum lease payments, 2021	0
Finance leases, Total future minimum lease payments, 2022	0
Finance leases, Total future minimum lease payments, 2023	0
Finance leases, Total future minimum lease payments, After 2023	0
Total future minimum lease payments	990
Total future minimum lease payments, 2019	9,613
Total future minimum lease payments, 2020	7,454
Total future minimum lease payments, 2021	6,252
Total future minimum lease payments, 2022	4,797
Total future minimum lease payments, 2023	3,320
Total future minimum lease payments, After 2023	7,470
Total future minimum lease payments	$ 38,906