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Stock-based compensation (Tables)	12 Months Ended
Stock-based compensation (Tables)	Dec. 31, 2022
Executive Officers
Schedule of Unvested Restricted Stock Units Roll Forward	(Not in thousands) Shares Weighted-average grant date fair value Non-vested at January 1, 2020 345,365 $ 41.68 Granted 253,943 42.49 Performance Shares Quantity Adjustment (7) 48.79 Vested (234,421) 42.64 Forfeited (6,368) 44.26 Non-vested at December 31, 2020 358,512 $ 41.23 Granted 191,479 69.38 Performance Shares Quantity Adjustment 54,306 54.21 Vested (273,974) 55.11 Forfeited (8,440) 43.48 Non-vested at December 31, 2021 321,883 $ 47.98 Granted 194,791 84.29 Performance Shares Quantity Adjustment 6,947 78.02 Vested (240,033) 66.11 Forfeited (1,625) 78.86 Non-vested at December 31, 2022 281,963 $ 56.50
Directors
Schedule of Unvested Restricted Stock Units Roll Forward	(Not in thousands) RSU Weighted-average grant date fair value Non-vested at January 1, 2020 - - Granted 43,866 $ 35.47 Vested (43,866) 35.47 Forfeited - - Non-vested at December 31, 2020 - - Granted 20,638 $ 78.20 Vested (20,638) 78.20 Forfeited - - Non-vested at December 31, 2021 - - Granted 25,321 $ 77.48 Vested (25,321) 77.48 Forfeited - - Non-vested at December 31, 2022 - -