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Equity details textual (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Sep. 30, 2023
Jun. 30, 2023
Sep. 30, 2022
Jun. 30, 2022
Equity [Abstract]                
Dividends per share $ 0.20 $ 0.20 $ 0.4 $ 0.4        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 1,328,104 $ 1,289,201 $ 1,328,104 $ 1,289,201 $ 1,298,751 $ 1,314,168 $ 1,238,345 $ 1,291,247
Net income 24,328 22,924 54,697 52,561        
Other comprehensive income (loss), net of tax 30,859 50,088 13,050 1,077        
Stock Issued During Period, Value, Dividend Reinvestment Plan 45 47 90 93        
Stock Issued During Period, Value, Employee Benefit Plan 5,059 4,584 6,697 8,066        
Stock Repurchased During Period, Value (15,029) (10,692) (28,754) (30,068)        
Dividends, Common Stock, Cash (15,909) (16,095) (31,844) (32,371)        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 1,328,104 1,289,201 1,328,104 1,289,201 1,298,751 1,314,168 1,238,345 1,291,247
Net income 24,328 22,924 54,697 52,561        
Other comprehensive income (loss), net of tax 30,859 50,088 13,050 1,077        
Stock Issued During Period, Value, Dividend Reinvestment Plan 45 47 90 93        
Stock Issued During Period, Value, Employee Benefit Plan 5,059 4,584 6,697 8,066        
Stock Repurchased During Period, Value 15,029 10,692 28,754 30,068        
Dividends, Common Stock, Cash $ 15,909 $ 16,095 $ 31,844 $ 32,371        
Dividends per share $ 0.20 $ 0.20 $ 0.4 $ 0.4        
Common Stock [Member]                
Equity [Abstract]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest $ 99,071 $ 100,641 $ 99,071 $ 100,641 99,773 99,794 101,095 101,671
Stock Issued During Period, Value, Dividend Reinvestment Plan 2 2 5 4        
Stock Issued During Period, Value, Employee Benefit Plan 80 131 689 585        
Stock Repurchased During Period, Value (784) (587) (1,417) (1,619)        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 99,071 100,641 99,071 100,641 99,773 99,794 101,095 101,671
Stock Issued During Period, Value, Dividend Reinvestment Plan 2 2 5 4        
Stock Issued During Period, Value, Employee Benefit Plan 80 131 689 585        
Stock Repurchased During Period, Value 784 587 1,417 1,619        
Additional Paid-in Capital [Member]                
Equity [Abstract]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 444,162 473,323 444,162 473,323 453,385 465,406 478,930 494,202
Stock Issued During Period, Value, Dividend Reinvestment Plan 43 45 85 89        
Stock Issued During Period, Value, Employee Benefit Plan 4,979 4,453 6,008 7,481        
Stock Repurchased During Period, Value (14,245) (10,105) (27,337) (28,449)        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 444,162 473,323 444,162 473,323 453,385 465,406 478,930 494,202
Stock Issued During Period, Value, Dividend Reinvestment Plan 43 45 85 89        
Stock Issued During Period, Value, Employee Benefit Plan 4,979 4,453 6,008 7,481        
Stock Repurchased During Period, Value 14,245 10,105 27,337 28,449        
Retained Earnings [Member]                
Equity [Abstract]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 1,145,911 1,088,379 1,145,911 1,088,379 1,138,712 1,124,590 1,082,575 1,070,655
Net income 23,108 21,899 53,165 50,095        
Dividends, Common Stock, Cash (15,909) (16,095) (31,844) (32,371)        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 1,145,911 1,088,379 1,145,911 1,088,379 1,138,712 1,124,590 1,082,575 1,070,655
Net income 23,108 21,899 53,165 50,095        
Dividends, Common Stock, Cash 15,909 16,095 31,844 32,371        
AOCI Attributable to Parent [Member]                
Equity [Abstract]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (401,321) (412,176) (401,321) (412,176) (431,512) (414,343) (461,197) (413,951)
Other comprehensive income (loss), net of tax 30,191 49,021 13,022 1,775        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest (401,321) (412,176) (401,321) (412,176) (431,512) (414,343) (461,197) (413,951)
Other comprehensive income (loss), net of tax 30,191 49,021 13,022 1,775        
Noncontrolling Interest [Member]                
Equity [Abstract]                
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 40,281 39,034 40,281 39,034 38,393 38,721 36,942 38,670
Net income 1,220 1,025 1,532 2,466        
Other comprehensive income (loss), net of tax 668 1,067 28 (698)        
Dividends, Common Stock, Cash       (1,404)        
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest 40,281 39,034 40,281 39,034 $ 38,393 $ 38,721 $ 36,942 $ 38,670
Net income 1,220 1,025 1,532 2,466        
Other comprehensive income (loss), net of tax $ 668 $ 1,067 $ 28 (698)        
Dividends, Common Stock, Cash       $ 1,404