Significant Accounting Policies - Schedule of Impact of CECL Adoption (Detail) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Jan. 01, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					$ 28,511
Reserve for Unfunded Commitments	$ 3,400			$ 3,400
Total Reserve for Credit Losses	38,849	$ 36,170			28,511
Decrease to Retained Earnings	187,638	$ 183,788
CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease to Retained Earnings	$ (6,100)			(6,100)
ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				34,475
Reserve for Unfunded Commitments				3,386
Total Reserve for Credit Losses				37,861
CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				4,296
Reserve for Unfunded Commitments				3,386
Total Reserve for Credit Losses				7,682
Retained Earnings, Total Pre-tax Impact				(7,682)
Retained Earnings, Tax Effect				1,613
CECL Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Decrease to Retained Earnings				(6,069)
PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				1,668
Total Reserve for Credit Losses			$ 1,668	1,668
Commercial and Agriculture [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					3,011
Commercial and Agriculture [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				3,830
Commercial and Agriculture [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				429
Commercial and Agriculture [Member] | PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				390
Commercial Real Estate Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					4,565
Commercial Real Estate Owner Occupied [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				5,819
Commercial Real Estate Owner Occupied [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				1,075
Commercial Real Estate Owner Occupied [Member] | PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				179
Commercial Real Estate Non Owner Occupied [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					14,138
Commercial Real Estate Non Owner Occupied [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				11,291
Commercial Real Estate Non Owner Occupied [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				(2,847)
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					3,145
Residential Real Estate [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				6,293
Residential Real Estate [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				2,762
Residential Real Estate [Member] | PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				386
Real Estate Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					2,293
Real Estate Construction [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				3,795
Real Estate Construction [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				1,502
Farm Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					291
Farm Real Estate [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				263
Farm Real Estate [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				(28)
Lease Financing Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					429
Lease Financing Receivables [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				2,807
Lease Financing Receivables [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				1,743
Lease Financing Receivables [Member] | PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				635
Consumer and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					98
Consumer and Other [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				377
Consumer and Other [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				201
Consumer and Other [Member] | PCD Loans [Member] | ASU 2016-13 [Member] | CECL Adoption Adjustments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				78
Unallocated [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses					$ 541
Unallocated [Member] | CECL Loans [Member] | ASU 2016-13 [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for Credit Losses				$ (541)