UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Retained Earnings- Substantially Restricted	Accumulated Other Compre- hensive (Loss) Income
Balance, beginning (in shares) at Dec. 31, 2022		110,777,780
Balance, beginning at Dec. 31, 2022	$ 2,843,305	$ 1,108	$ 2,344,005	$ 966,984	$ (468,792)
Increase (Decrease) in Stockholders' Equity
Net income	116,166			116,166
Other comprehensive income (loss)	38,005				38,005
Cash dividends declared	(73,368)			(73,368)
Stock issuances under stock incentive plans (in shares)		96,107
Stock issuances under stock incentive plans	0	$ 1	(1)
Stock-based compensation and related taxes	2,418		2,418
Balance, ending (in shares) at Jun. 30, 2023		110,873,887
Balance, ending at Jun. 30, 2023	2,926,526	$ 1,109	2,346,422	1,009,782	(430,787)
Balance, beginning (in shares) at Mar. 31, 2023		110,868,713
Balance, beginning at Mar. 31, 2023	2,926,904	$ 1,109	2,344,514	991,509	(410,228)
Increase (Decrease) in Stockholders' Equity
Net income	54,955			54,955
Other comprehensive income (loss)	(20,559)				(20,559)
Cash dividends declared	(36,682)			(36,682)
Stock issuances under stock incentive plans (in shares)		5,174
Stock-based compensation and related taxes	1,908		1,908
Balance, ending (in shares) at Jun. 30, 2023		110,873,887
Balance, ending at Jun. 30, 2023	$ 2,926,526	$ 1,109	2,346,422	1,009,782	(430,787)
Balance, beginning (in shares) at Dec. 31, 2023	110,888,942	110,888,942
Balance, beginning at Dec. 31, 2023	$ 3,020,281	$ 1,109	2,350,104	1,043,181	(374,113)
Increase (Decrease) in Stockholders' Equity
Net income	77,335			77,335
Other comprehensive income (loss)	19,462				19,462
Cash dividends declared	(75,033)			(75,033)
Stock issued in connection with acquisitions (in shares)		2,389,684
Stock issued in connection with acquisitions	92,385	$ 24	92,361
Stock issuances under stock incentive plans (in shares)		115,466
Stock issuances under stock incentive plans	0	$ 1	(1)
Stock-based compensation and related taxes	$ 3,015		3,015
Balance, ending (in shares) at Jun. 30, 2024	113,394,092	113,394,092
Balance, ending at Jun. 30, 2024	$ 3,137,445	$ 1,134	2,445,479	1,045,483	(354,651)
Balance, beginning (in shares) at Mar. 31, 2024		113,388,590
Balance, beginning at Mar. 31, 2024	3,110,707	$ 1,134	2,443,584	1,038,294	(372,305)
Increase (Decrease) in Stockholders' Equity
Net income	44,708			44,708
Other comprehensive income (loss)	17,654				17,654
Cash dividends declared	(37,519)			(37,519)
Stock issuances under stock incentive plans (in shares)		5,502
Stock-based compensation and related taxes	$ 1,895		1,895
Balance, ending (in shares) at Jun. 30, 2024	113,394,092	113,394,092
Balance, ending at Jun. 30, 2024	$ 3,137,445	$ 1,134	$ 2,445,479	$ 1,045,483	$ (354,651)