Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 178,101	$ 28,139
Adjustments for items not affecting cash:
Depreciation and amortization expenses	24,225	21,070
Share-based payments expense	7,590	7,193
Deferred income tax expense	12,434	963
Unrealized foreign exchange (gain) loss	(248)	459
Gain on disposition of property, plant and equipment	(169,820)	(68)
Amortization of debt issuance costs	848	720
Amortization of right-of-use assets	3,455	3,172
Change in fair value of derivatives	(1,263)
Other, net	1,111	1,184
Net changes in operating assets and liabilities	128,701	117,855
Net cash provided by operating activities	185,134	180,687
Investing activities:
Acquisitions, net of cash acquired	(63)
Property, plant and equipment additions	(2,002)	(1,556)
Proceeds on disposition of property, plant and equipment	164,659	66
Intangible asset additions	(7,762)	(8,769)
Issuance of loans receivable	(1,099)
Repayment of loans receivable	1,212	224
Net cash provided by (used in) investing activities	154,945	(10,035)
Financing activities:
Dividends paid to stockholders	(27,659)	(24,181)
Proceeds from exercise of options and share option plans	986	6,719
Payment of withholding taxes on issuance of shares	(1,531)	(7,542)
Net increase (decrease) in short-term debt	15,376	(2,886)
Repayment of long-term debt	(162,698)	(2,626)
Debt issue costs	(2,261)
Repayment of finance lease obligations	(2,506)	(2,629)
Net cash used in financing activities	(180,293)	(33,145)
Effect of changes in foreign currency rates on cash, cash equivalents, and restricted cash	7,840	(2,782)
Increase	167,626	134,725
Beginning of period	1,362,452	306,895
Cash, cash equivalents, and restricted cash, end of period	$ 1,530,078	$ 441,620