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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Operating Activities    
Net earnings $ 727,828 $ 484,950
Adjustments and items not affecting cash:    
Depreciation and amortization 314,123 284,304
Deferred taxes 59,695 53,686
Unrealized gain on derivative financial instruments (2,124) (15,237)
Share-based compensation expense 24,637 11,042
Cost of equity funds used for construction purposes (2,219) (4,896)
Change in value of investments carried at fair value (559,701) (276,458)
Pension and post-employment expense in excess of (lower than) contributions 2,182 (8,952)
Distributions received from equity investments, net of income 3,869 7,487
Others 14,406 15,031
Changes in non-cash operating items (77,479) 60,303
Net Cash Provided by (Used in) Operating Activities, Total 505,217 611,260
Financing Activities    
Increase in long-term debt 3,471,740 3,614,758
Decrease in long-term debt (3,160,523) (3,048,008)
Issuance of common shares, net of costs 820,767 362,364
Cash dividends on common shares (253,762) (196,391)
Dividends on preferred shares (8,401) (8,486)
Contributions from non-controlling interests, related party 0 96,752
Contributions from non-controlling interests and redeemable non-controlling interests (note 17) 3,717 3,403
Production-based cash contributions from non-controlling interest 3,371 3,565
Distributions to non-controlling interests, related party (note 16(b) and (c)) (27,447) (38,718)
Distributions to non-controlling interests (11,417) (12,251)
Payments upon settlement of derivatives 0 (8,732)
Shares surrendered to fund withholding taxes on exercised share options (5,274) (5,282)
Repurchase of non-controlling interest (76,046) 0
Increase in other long-term liabilities 18,342 10,175
Decrease in other long-term liabilities (8,208) (39,783)
Net Cash Provided by (Used in) Financing Activities, Total 766,859 733,366
Investing Activities    
Additions to property, plant and equipment and intangible assets (786,030) (581,332)
Increase in long-term investments (279,188) (669,832)
Acquisitions of operating entities (note 3) (402,784) (308,423)
Increase in other assets (21,419) (16,690)
Receipt of principal on development loans receivable 244,285 251,118
Distributions received from equity investments 14,818 1,000
Proceeds from sale of long-lived assets 415 0
Net Cash Provided by (Used in) Investing Activities, Total (1,229,903) (1,324,159)
Effect of exchange rate differences on cash and restricted cash 573 1,032
Increase in cash, cash equivalents and restricted cash 42,746 21,499
Cash, cash equivalents and restricted cash, beginning of year 87,272 65,773
Cash, cash equivalents and restricted cash, end of year 130,018 87,272
Supplemental disclosure of cash flow information:    
Cash paid during the year for interest expense 190,942 171,548
Cash paid during the year for income taxes 5,603 14,543
Cash received during the year for distributions from equity investments 121,506 131,492
Non-cash financing and investing activities:    
Property, plant and equipment acquisitions in accruals 74,505 98,231
Issuance of common shares under dividend reinvestment plan and share-based compensation plans 94,321 87,414
Sale of property, plant and equipment, intangible assets and accrued liabilities in exchange of note receivable 27,611 57,753
Convertible Debentures    
Non-cash financing and investing activities:    
Issuance of common shares upon conversion of convertible debentures $ 50 $ 155