UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - Supplemental - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Supplemental disclosures:
Cash and cash equivalents	$ 212,815	$ 266,372
Restricted cash (Note 1)	1,874	109
Total cash, cash equivalents and restricted cash shown in the statements of cash flows	214,689	266,481
Cash paid for income taxes, net of refunds	2,289	5,295
Non-cash transactions
Property and equipment purchases in accounts payable and accrued liabilities	$ 2,009	$ 571