LEASES - Lease-related assets and liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Assets
Finance lease assets, net	$ 181,097	$ 104,815
Operating Lease Right-of-use Assets	61,658	121,269
Total lease assets	242,755	226,084
Liabilities
Finance lease liabilities, current	11,705	11,460
Operating lease liabilities, current	17,231	34,492
Finance lease liabilities, long-term	180,450	95,710
Operating lease liabilities, long-term	58,810	112,707
Total lease liabilities	$ 268,196	$ 254,369