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Subsequent events (Detail) - $ / shares
3 Months Ended
May 04, 2023
Mar. 24, 2023
Feb. 09, 2023
Sep. 23, 2022
Jun. 24, 2022
Mar. 23, 2022
Feb. 10, 2022
Feb. 09, 2021
Mar. 31, 2023
Mar. 31, 2022
Subsequent Event [Line Items]                    
Dividends per common share (in usd per share)   $ 0.1375 $ 0.1375 $ 0.125 $ 0.125 $ 0.125 $ 0.125 $ 0.1075 $ 0.1375 $ 0.1250
Subsequent Event                    
Subsequent Event [Line Items]                    
Dividends per common share (in usd per share) $ 0.1375