Fair Value Measurement - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Carrying Amount
Financial assets:
Cash and cash equivalents	$ 207,113	$ 199,252
Investment securities:
HTM, at carrying value	1,184,922	1,190,108
Mortgage-backed securities:
HTM, at carrying value	123,550	136,621
FHLB stock, at cost	10,801	9,190
Equity investments	4,337	5,946
Loans, net of allowance for loan losses	4,292,740	4,111,176
Loans held for sale	1,666	667
Financial liabilities:
Deposits	6,117,687	6,198,019
Other borrowings	500,341	221,153
FHLB borrowings	183,007	153,358
Subordinated notes, net of unamortized debt issuance costs	93,796	98,674
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,267	60,265
Estimated Fair Value
Financial assets:
Cash and cash equivalents	207,113	199,252
Investment securities:
HTM, at carrying value	1,035,925	1,023,376
Mortgage-backed securities:
HTM, at carrying value	112,890	125,780
FHLB stock, at cost	10,801	9,190
Equity investments	4,337	5,946
Loans, net of allowance for loan losses	3,989,515	3,880,664
Loans held for sale	1,666	667
Financial liabilities:
Deposits	6,081,139	6,158,517
Other borrowings	502,199	221,153
FHLB borrowings	169,942	140,976
Subordinated notes, net of unamortized debt issuance costs	85,323	91,357
Trust preferred subordinated debentures, net of unamortized debt issuance costs	54,964	60,594
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	207,113	199,252
Investment securities:
HTM, at carrying value	0	0
Mortgage-backed securities:
HTM, at carrying value	0	0
FHLB stock, at cost	0	0
Equity investments	0	0
Loans, net of allowance for loan losses	0	0
Loans held for sale	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
FHLB borrowings	0	0
Subordinated notes, net of unamortized debt issuance costs	0	0
Trust preferred subordinated debentures, net of unamortized debt issuance costs	0	0
Estimated Fair Value | Level 2
Financial assets:
Cash and cash equivalents	0	0
Investment securities:
HTM, at carrying value	1,035,925	1,023,376
Mortgage-backed securities:
HTM, at carrying value	112,890	125,780
FHLB stock, at cost	10,801	9,190
Equity investments	4,337	5,946
Loans, net of allowance for loan losses	0	0
Loans held for sale	1,666	667
Financial liabilities:
Deposits	6,081,139	6,158,517
Other borrowings	502,199	221,153
FHLB borrowings	169,942	140,976
Subordinated notes, net of unamortized debt issuance costs	85,323	91,357
Trust preferred subordinated debentures, net of unamortized debt issuance costs	54,964	60,594
Estimated Fair Value | Level 3
Financial assets:
Cash and cash equivalents	0	0
Investment securities:
HTM, at carrying value	0	0
Mortgage-backed securities:
HTM, at carrying value	0	0
FHLB stock, at cost	0	0
Equity investments	0	0
Loans, net of allowance for loan losses	3,989,515	3,880,664
Loans held for sale	0	0
Financial liabilities:
Deposits	0	0
Other borrowings	0	0
FHLB borrowings	0	0
Subordinated notes, net of unamortized debt issuance costs	0	0
Trust preferred subordinated debentures, net of unamortized debt issuance costs	$ 0	$ 0