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Stock-based compensation (Tables)	6 Months Ended
Stock-based compensation (Tables)	Jun. 30, 2024
Executive Officers
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Schedule of restricted and unrestricted stock units	(Not in thousands) Shares Weighted-Average Grant Date Fair Value Non-vested at December 31, 2022 281,963 $ 56.50 Granted 257,757 66.01 Performance Shares Quantity Adjustment 19,753 75.32 Vested (243,133) 66.31 Forfeited (16,444) 55.82 Non-vested at December 31, 2023 299,896 $ 58.20 Granted 240,816 86.53 Performance Shares Quantity Adjustment 17,551 86.44 Vested (284,249) 75.59 Forfeited (2,553) 63.21 Non-vested at June 30, 2024 271,461 $ 67.53
Directors
Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Line Items]
Schedule of restricted and unrestricted stock units	(Not in thousands) RSUs / Unrestricted stock Weighted-Average Grant Date Fair Value per Unit Non-vested at December 31, 2022 - $ - Granted 39,104 55.30 Vested (39,104) 55.30 Forfeited - - Non-vested at December 31, 2023 - $ - Granted 22,998 89.28 Vested (22,998) 89.28 Forfeited - - Non-vested at June 30, 2024 - $ -