Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Total	Common Stock Outstanding	Common Stock	Value of Shares Held in Rabbi Trust at Cost	Deferred Compensation and Other Retirement Benefit Obligations	Additional Paid in Capital		Retained Earnings	Accumulated Other Comprehensive Income/(Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		42,873,187
Net income	$ 142,047							$ 142,047
Other comprehensive income	$ 37,625								$ 37,625
Cash dividends declared per common share (in dollars per share)	$ 1.71
Common dividend declared	$ (72,620)							(72,620)
Stock Issued During Period, Value, Acquisitions	0
Stock based compensation	4,953					$ 4,953
Restricted stock awards issued, net of awards surrendered		102,754
Restricted stock awards issued, net of awards surrendered	(781)		$ 1			(782)
Shares issued under direct stock purchase plan		37,090
Shares issued under direct stock purchase plan	1,970		0			1,970
Stock Repurchased During Period, Shares		(532,266)
Stock Repurchased During Period, Value	(31,297)		(5)			(31,292)	[1]
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits				$ (101)	$ 101
Increase (Decrease) in Deferred Compensation	0
Period End Balance at Sep. 30, 2024	2,977,148		423	(3,399)	3,399	1,907,012		1,146,915	(77,202)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		42,469,867
Net income	42,947							42,947
Other comprehensive income	$ 37,023								37,023
Cash dividends declared per common share (in dollars per share)	$ 0.57
Common dividend declared	$ (24,214)							(24,214)
Stock based compensation	1,514					1,514
Restricted stock awards issued, net of awards surrendered		(2,559)
Restricted stock awards issued, net of awards surrendered	(20)					(20)
Shares issued under direct stock purchase plan		13,457
Shares issued under direct stock purchase plan	649					649
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits				(46)	46
Increase (Decrease) in Deferred Compensation	0
Period End Balance at Sep. 30, 2024	2,977,148		423	(3,399)	3,399	1,907,012		1,146,915	(77,202)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		42,480,765
Sales and Excise Tax Payable	$ 311
Common Stock, Shares, Outstanding	42,500,611	42,500,611
Net income	$ 129,787							129,787
Other comprehensive income	$ 42,445								42,445
Cash dividends declared per common share (in dollars per share)	$ 1.77
Common dividend declared	$ (79,668)							(79,668)
Stock Issued During Period, Value, Acquisitions	477,266		75			477,191
Stock Issued During Period, Shares, Acquisitions		7,478,906
Proceeds from exercise of stock options, net of cash paid		380
Stock based compensation	7,091					7,091
Restricted stock awards issued, net of awards surrendered		142,912
Restricted stock awards issued, net of awards surrendered	(1,386)		1			(1,387)
Shares issued under direct stock purchase plan		29,024
Shares issued under direct stock purchase plan	1,822					1,822
Stock Repurchased During Period, Shares		(364,528)
Stock Repurchased During Period, Value	(23,590)		(4)			(23,586)	[1]
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits				(122)	122
Increase (Decrease) in Deferred Compensation	0
Period End Balance at Sep. 30, 2025	3,546,887		495	(3,505)	3,505	2,371,111		1,222,843	(47,562)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding		42,627,286
Net income	34,262							34,262
Other comprehensive income	$ 10,521								10,521
Cash dividends declared per common share (in dollars per share)	$ 0.59
Common dividend declared	$ (29,378)							(29,378)
Stock Issued During Period, Value, Acquisitions	477,266		75			477,191
Stock Issued During Period, Shares, Acquisitions		7,478,906
Stock based compensation	2,247					2,247
Restricted stock awards issued, net of awards surrendered		34,324
Restricted stock awards issued, net of awards surrendered	(53)					(53)
Shares issued under direct stock purchase plan		11,317
Shares issued under direct stock purchase plan	756					756
Stock Repurchased During Period, Shares		(364,528)
Stock Repurchased During Period, Value	(23,590)		(4)			(23,586)	[1]
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits				(46)	46
Increase (Decrease) in Deferred Compensation	0
Period End Balance at Sep. 30, 2025	$ 3,546,887		$ 495	$ (3,505)	$ 3,505	$ 2,371,111		$ 1,222,843	$ (47,562)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common Stock, Shares, Outstanding	49,787,305	49,787,305
Sales and Excise Tax Payable	$ 234

[1] Inclusive of $234,000 and $311,000 impact of excise tax attributable to shares repurchased under a repurchase program for the nine months ended September 30, 2025 and 2024, respectively