Business Combinations - Information about Loans Acquired (Detail) - USD ($) $ in Thousands	Jul. 01, 2024	Feb. 09, 2024	Nov. 10, 2022
Business Acquisition [Line Items]
Fair value of acquired loans			$ 26
Bank Of Kirksville [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		$ 118,131
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		112,761
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,874
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		31,722
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		41,136
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		36,692
Bank Of Kirksville [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,337
Bank Of Kirksville [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		5,370
Bank Of Kirksville [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,069
Bank Of Kirksville [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,651
Bank Of Kirksville [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		2,560
Bank Of Kirksville [Member] | Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		90
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		115,591
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,959
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		32,300
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		42,318
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		37,641
Bank Of Kirksville [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,373
Bank Of Kirksville [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		6,841
Bank Of Kirksville [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		1,366
Bank Of Kirksville [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		2,044
Bank Of Kirksville [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		3,316
Bank Of Kirksville [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		115
Bank Of Kirksville [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(596)
Bank Of Kirksville [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(119)
Bank Of Kirksville [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(183)
Bank Of Kirksville [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(284)
Bank Of Kirksville [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(10)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(2,830)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(85)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(578)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(1,182)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(949)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(36)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(875)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(178)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(210)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		(472)
Bank Of Kirksville [Member] | Fair Value Marks [Member] | Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans		$ (15)
KansasLand Bank [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ 27,926
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	24,291
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	149
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	4,291
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	6,950
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	9,257
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,126
KansasLand Bank [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,518
KansasLand Bank [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	3,635
KansasLand Bank [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	86
KansasLand Bank [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	388
KansasLand Bank [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,968
KansasLand Bank [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	193
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	25,066
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	163
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	4,549
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	7,053
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	9,644
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	2,133
KansasLand Bank [Member] | Loan Par Value [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	1,524
KansasLand Bank [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	4,549
KansasLand Bank [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	109
KansasLand Bank [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	479
KansasLand Bank [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	3,717
KansasLand Bank [Member] | Loan Par Value [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	244
KansasLand Bank [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(404)
KansasLand Bank [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(9)
KansasLand Bank [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(43)
KansasLand Bank [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(330)
KansasLand Bank [Member] | Credit Marks in ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(22)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(775)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(14)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(258)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(103)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(387)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(7)
KansasLand Bank [Member] | Fair Value Marks [Member] | Non-Purchase Credit Deteriorated Loans [Member] | Consumer [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(6)
KansasLand Bank [Member] | Discounts from Other Factors Excluding ACL [Member] | Purchase Credit Deteriorated Loans [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(510)
KansasLand Bank [Member] | Discounts from Other Factors Excluding ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Commercial and Industrial [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(14)
KansasLand Bank [Member] | Discounts from Other Factors Excluding ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Residential Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(48)
KansasLand Bank [Member] | Discounts from Other Factors Excluding ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural Real Estate [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	(419)
KansasLand Bank [Member] | Discounts from Other Factors Excluding ACL [Member] | Purchase Credit Deteriorated Loans [Member] | Agricultural [Member]
Business Acquisition [Line Items]
Fair value of acquired loans	$ (29)