LEASES - Balance Sheet Classification (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019	Jan. 01, 2019
Assets:
Operating lease right-of-use assets	$ 303,754		$ 310,238
Finance lease assets	856		906
Total leased assets	304,610		311,144	$ 384,187
Liabilities, Current [Abstract]
Current portion of operating lease liabilities	24,529		23,736
Finance lease, current	234		231
Liabilities, Noncurrent [Abstract]
Operating lease liabilities, less current portion	289,187		295,636
Finance lease, noncurrent	390		445
Total lease liabilities	314,340		$ 320,048	$ 389,403
Accumulated amortization of finance leases	$ 1,583	$ 1,522