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Earnings per share (Details) - $ / shares
shares in Thousands
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Earnings Per Share [Abstract]    
Weighted average common shares outstanding - basic 203,624 203,351
Effect of dilutive performance share awards and restricted stock units 286 40
Weighted average common shares outstanding - diluted 203,910 203,391
Shares excluded from the calculation of diluted earnings per share 0 0
Dividends declared per common share $ 0.2225 $ 0.2175