Allowance for Loan Losses - Credit Exposures by Internally Assigned Grades (Detail) $ in Thousands	Dec. 31, 2022 USD ($)
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	$ 2,049,931
Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	278,595
Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	371,147
Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,018,736
Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	119,991
Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	198,955
Farm Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	24,708
Lease Financing Receivable [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	36,797
Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,002
Pass [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,018,985
Pass [Member] | Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	273,291
Pass [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	367,652
Pass [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	1,003,942
Pass [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	114,021
Pass [Member] | Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	198,734
Pass [Member] | Farm Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	24,283
Pass [Member] | Lease Financing Receivable [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	36,223
Pass [Member] | Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	839
Special Mention [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	14,801
Special Mention [Member] | Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,558
Special Mention [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	734
Special Mention [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	10,947
Special Mention [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	183
Special Mention [Member] | Farm Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	379
Substandard [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	15,972
Substandard [Member] | Commercial and Agriculture [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,746
Substandard [Member] | Commercial Real Estate Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	2,761
Substandard [Member] | Commercial Real Estate Non Owner Occupied [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	3,847
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	5,787
Substandard [Member] | Real Estate Construction [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	221
Substandard [Member] | Farm Real Estate [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	46
Substandard [Member] | Lease Financing Receivable [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	401
Substandard [Member] | Consumer and Other [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	163
Doubtful [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	173
Doubtful [Member] | Lease Financing Receivable [Member]
Financing Receivable Recorded Investment [Line Items]
Loans with credit exposures as assigned an internal risk grade	$ 173