UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Supplemental disclosures:
Cash and cash equivalents	$ 386,367	$ 154,822
Restricted cash (Note 1)	2,071	108
Total cash, cash equivalents and restricted cash shown in the statements of cash flows	388,438	154,930
Cash paid for income taxes, net of refunds	334	4,152
Non-cash transactions
Property and equipment purchases in accounts payable and accrued liabilities	$ 888	$ 517