RECONCILIATION OF CASH, CASH EQUIVALENTS AND RESTRICTED CASH - Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash Cash Equivalents And Restricted Cash [Abstract]
Cash and cash equivalents	$ 467,779	$ 547,178	$ 724,959
Restricted cash included in prepaid expenses and other current assets	167		439
Restricted cash included in long-term other assets	2,447		2,306
Total cash, cash equivalents, and restricted cash shown in the condensed consolidated statements of cash flows	$ 470,393	$ 549,628	$ 727,704	$ 422,631