Fair Value Disclosures - Assets, Liabilities and Off-balance Sheet Items Not Measured at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Assets:
Held-to-maturity securities	$ 113,166	$ 115,007
Deposits:
Time deposits	1,500,959	1,453,706
Subordinated notes	149,511	149,261
Estimate of Fair Value Measurement
Assets:
Cash and short-term interest-earning assets	160,365	328,844
Held-to-maturity securities	113,166	115,007
Net loans and leases held for investment	6,627,734	6,586,054
Servicing rights	11,424	12,710
Total assets	6,912,689	7,042,615
Deposits:
Demand and savings deposits, non-maturity	5,081,701	5,305,553
Time deposits	1,502,566	1,458,774
Total deposits	6,584,267	6,764,327
Short-term borrowings	6,271	11,181
Long-term debt	201,508	225,475
Subordinated notes	150,000	147,500
Total liabilities	6,942,046	7,148,483
Estimate of Fair Value Measurement | Level 1
Assets:
Cash and short-term interest-earning assets	160,365	328,844
Held-to-maturity securities	0	0
Net loans and leases held for investment	0	0
Servicing rights	0	0
Total assets	160,365	328,844
Deposits:
Demand and savings deposits, non-maturity	5,081,701	5,305,553
Time deposits	0	0
Total deposits	5,081,701	5,305,553
Short-term borrowings	6,271	11,181
Long-term debt	0	0
Subordinated notes	0	0
Total liabilities	5,087,972	5,316,734
Estimate of Fair Value Measurement | Level 2
Assets:
Cash and short-term interest-earning assets	0	0
Held-to-maturity securities	113,166	115,007
Net loans and leases held for investment	0	0
Servicing rights	0	0
Total assets	113,166	115,007
Deposits:
Demand and savings deposits, non-maturity	0	0
Time deposits	1,502,566	1,458,774
Total deposits	1,502,566	1,458,774
Short-term borrowings	0	0
Long-term debt	201,508	225,475
Subordinated notes	150,000	147,500
Total liabilities	1,854,074	1,831,749
Estimate of Fair Value Measurement | Level 3
Assets:
Cash and short-term interest-earning assets	0	0
Held-to-maturity securities	0	0
Net loans and leases held for investment	6,627,734	6,586,054
Servicing rights	11,424	12,710
Total assets	6,639,158	6,598,764
Deposits:
Demand and savings deposits, non-maturity	0	0
Time deposits	0	0
Total deposits	0	0
Short-term borrowings	0	0
Long-term debt	0	0
Subordinated notes	0	0
Total liabilities	0	0
Carrying Amount
Assets:
Cash and short-term interest-earning assets	160,365	328,844
Held-to-maturity securities	128,455	134,111
Federal Home Loan Bank, Federal Reserve Bank and other stock	36,482	38,980
Net loans and leases held for investment	6,689,536	6,729,381
Servicing rights	6,909	6,990
Total assets	7,021,747	7,238,306
Deposits:
Demand and savings deposits, non-maturity	5,081,701	5,305,553
Time deposits	1,500,959	1,453,706
Total deposits	6,582,660	6,759,259
Short-term borrowings	6,271	11,181
Long-term debt	200,000	225,000
Subordinated notes	149,511	149,261
Total liabilities	$ 6,938,442	$ 7,144,701