SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Cash Flows (Detail) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents
Cash and cash equivalents	$ 275,202	$ 120,685	$ 74,184	$ 90,058
Restricted cash	10,894	8,677	15,454	20,821
Pledged cash and cash equivalents (NOTE 9)	5,772	7,204	4,082	9,469
Total cash, cash equivalents, restricted cash, and restricted cash equivalents	$ 291,868	$ 136,566	$ 93,720	$ 120,348

Amount of cash and cash equivalents restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Balance Type:	debit
Period Type:	instant