Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands		Total	Common Stock Outstanding	Common Stock	Value of Shares Held in Rabbi Trust at Cost	Deferred Compensation Obligation	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)
Beginning balance at Dec. 31, 2020		$ 1,702,685		$ 328	$ (3,066)	$ 3,066	$ 945,638	$ 716,024	$ 40,695
Beginning balance (in shares) at Dec. 31, 2020			32,965,692
Net income		120,992						$ 120,992
Other comprehensive loss		(38,512)							(38,512)
Common Stock, Dividends, Per Share, Declared								$ 1.92
Common dividend declared		(70,300)						$ (70,300)
Common stock issued for acquisition		1,298,558		143			1,298,415
Common stock issued for acquisition (in shares)			14,299,720
Stock Repurchased During Period, Value, as a result of Stock Options Exercised		(57)					(57)
Proceeds from exercise of stock options (in shares)			4,744
Stock based compensation		4,309					4,309
Restricted stock awards issued, net of awards surrendered (in shares)			53,768
Restricted stock awards issued, net of awards surrendered		(1,249)		1			(1,250)
Stock Issued During Period, Shares, Other			25,854
Stock Issued During Period, Value, Other		2,023		0			2,023
Increase (Decrease) in Deferred Compensation					(80)	80
Ending balance (in shares) at Dec. 31, 2021			47,349,778
Ending balance at Dec. 31, 2021		3,018,449		472	(3,146)	3,146	2,249,078	766,716	2,183
Net income		263,813						$ 263,813
Other comprehensive loss		(165,267)							(165,267)
Common Stock, Dividends, Per Share, Declared								$ 2.08
Common dividend declared		(96,087)						$ (96,087)
Common stock issued for acquisition		0
Stock based compensation		4,464					4,464
Restricted stock awards issued, net of awards surrendered (in shares)			49,016
Restricted stock awards issued, net of awards surrendered		(1,084)		1			(1,085)
Stock Issued During Period, Shares, Other			29,409
Stock Issued During Period, Value, Other		2,359		0			2,359
Stock Repurchased During Period, Shares			(1,786,965)
Stock Repurchased During Period, Value		(139,946)		(18)			(139,928)
Increase (Decrease) in Deferred Compensation		$ 0
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits					(81)	81
Ending balance (in shares) at Dec. 31, 2022		45,641,238	45,641,238
Ending balance at Dec. 31, 2022		$ 2,886,701		455	(3,227)	3,227	2,114,888	934,442	(163,084)
Net income		239,502						$ 239,502
Other comprehensive loss		48,257							48,257
Common Stock, Dividends, Per Share, Declared								$ 2.20
Common dividend declared		(96,456)						$ (96,456)
Common stock issued for acquisition		0
Proceeds from exercise of stock options, net of cash paid		81					81
Proceeds from exercise of stock options (in shares)			3,238
Stock based compensation		6,377					6,377
Restricted stock awards issued, net of awards surrendered (in shares)			82,181
Restricted stock awards issued, net of awards surrendered		(1,135)		1			(1,136)
Stock Issued During Period, Shares, Other			46,963
Stock Issued During Period, Value, Other		2,682					2,682
Stock Repurchased During Period, Shares	[1]		(2,900,433)
Stock Repurchased During Period, Value	[1]	(190,758)		(29)			(190,729)
Increase (Decrease) in Deferred Compensation		$ 0
Increase (Decrease) in Deferred Compensation and Other Retirement Benefits					(71)	71
Ending balance (in shares) at Dec. 31, 2023		42,873,187	42,873,187
Ending balance at Dec. 31, 2023		$ 2,895,251		$ 427	$ (3,298)	$ 3,298	$ 1,932,163	$ 1,077,488	$ (114,827)
Sales and Excise Tax Payable		$ 1,800

[1] Inclusive of $1.8 million impact of excise tax attributable to shares repurchased under the share repurchase program during the year ended December 31, 2023.