Fair Value Measurement - Balance Sheet Grouping (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Carrying Amount
Financial assets:
Cash and cash equivalents	$ 195,127	$ 201,753
Investment securities:
HTM, at carrying value	1,013,674	788
Mortgage-backed securities:
HTM, at carrying value	137,531	89,992
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	4,026,989	3,609,889
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,181,159	5,722,327
Other borrowings	74,721	23,219
FHLB borrowings	243,531	344,038
Subordinated notes, net of unamortized debt issuance costs	98,639	98,534
Trust preferred subordinated debentures, net of unamortized debt issuance costs	60,264	60,260
Estimated Fair Value
Financial assets:
Cash and cash equivalents	195,127	201,753
Investment securities:
HTM, at carrying value	816,756	791
Mortgage-backed securities:
HTM, at carrying value	126,566	94,444
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	3,793,430	3,748,116
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,126,861	5,721,694
Other borrowings	74,721	23,219
FHLB borrowings	243,512	346,604
Subordinated notes, net of unamortized debt issuance costs	89,214	98,642
Trust preferred subordinated debentures, net of unamortized debt issuance costs	57,598	48,480
Estimated Fair Value | Level 1
Financial assets:
Cash and cash equivalents	195,127	201,753
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	816,756	791
Mortgage-backed securities:
HTM, at carrying value	126,566	94,444
FHLB stock, at cost	12,887	14,375
Equity investments	5,828	5,921
Loans, net of allowance for loan losses	0	0
Loans held for sale	421	1,684
Financial liabilities:
Deposits	6,126,861	5,721,694
Other borrowings	74,721	23,219
FHLB borrowings	243,512	346,604
Subordinated notes, net of unamortized debt issuance costs	89,214	98,642
Trust preferred subordinated debentures, net of unamortized debt issuance costs	57,598	48,480
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	3,793,430	3,748,116
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