LEASES - Schedule of leases assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Assets:
Operating lease right-of-use assets	$ 18,734	$ 18,992
Liabilities:
Operating leases, short-term	5,904	6,387
Operating leases, long-term	16,279	16,822
Total lease liabilities	$ 22,183	$ 23,209