LEASES - Supplemental Balance Sheet Information (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019
Assets
Operating lease right-of-use assets	$ 65,268	$ 66,191	$ 70,851
Liabilities
Short-term operating lease liabilities	15,926	17,603	17,660
Long-term operating lease liabilities	47,480	$ 48,605	52,993
Total operating lease liabilities	$ 63,406		$ 70,653