SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash Flows (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Cash and cash equivalents	$ 205,309	$ 120,685	$ 109,862	$ 90,058
Restricted cash	30,745	8,677	17,561	20,821
Pledged cash and cash equivalents (NOTE 9)	8,543	7,204	6,423	9,469
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	$ 244,597	$ 136,566	$ 133,846	$ 120,348