Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net income	$ 231,512	$ 88,920
Adjustments for items not affecting cash:
Depreciation and amortization expenses	48,523	43,005
Share-based payments expense	21,527	16,183
Deferred income tax expense	9,480	1,719
Unrealized foreign exchange (gain) loss	(1,965)	(65)
Gain on disposition of property, plant and equipment	(170,167)	(243)
Loss on redemption of 2021 Notes	4,792
Amortization of debt issuance costs	2,352	1,443
Amortization of right-of-use assets	8,586	6,280
Change in fair value of derivatives	(1,263)
Other, net	2,805	1,568
Net changes in operating assets and liabilities	41,844	52,577
Net cash provided by operating activities	198,026	211,387
Investing activities:
Acquisitions, net of cash acquired	(63)	728
Property, plant and equipment additions	(4,522)	(4,616)
Proceeds on disposition of property, plant and equipment	165,132	342
Intangible asset additions	(15,730)	(17,361)
Issuance of loans receivable	(6,093)	(2,622)
Repayment of loans receivable	1,554	226
Net cash provided by (used in) investing activities	140,278	(23,303)
Financing activities:
Dividends paid to stockholders	(55,352)	(48,537)
Dividends paid to NCI		(26)
Proceeds from exercise of options and share option plans	2,862	10,699
Payment of withholding taxes on issuance of shares	(3,716)	(9,155)
Net increase (decrease) in short-term debt	2,722	6,842
Repayment of long-term debt	(1,093,772)	(5,328)
Debt issue costs	(3,677)
Repayment of finance lease obligations	(5,390)	(5,355)
Net cash used in financing activities	(1,156,323)	(50,860)
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	(12,773)	(1,396)
Increase	(830,792)	135,828
Beginning of period	1,362,452	306,895
Cash, cash equivalents, and restricted cash, end of period	$ 531,660	$ 442,723