Fair Value Measurements - Estimated Fair Value of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Financial Assets:
Fair Value	$ 282,288	$ 0
FHLB and ACBB stock	10,996	16,382
Financial Liabilities:
Time deposits	639,674	746,234
Securities sold under agreements to repurchase	66,787	65,845
Other borrowings	124,000	265,000
Trust preferred debentures	0	13,220
(Level 1)
Financial Assets:
Cash and cash equivalents	63,107	388,462
Fair Value	0
FHLB and ACBB stock	0	0
Accrued interest receivable	0	0
Loans and leases, net	0	0
Financial Liabilities:
Time deposits	0	0
Other deposits	0	0
Securities sold under agreements to repurchase	0	0
Other borrowings	0	0
Trust preferred debentures		0
Accrued interest payable	0	0
(Level 2)
Financial Assets:
Cash and cash equivalents	0	0
Fair Value	282,288
FHLB and ACBB stock	10,996	16,382
Accrued interest receivable	22,597	32,025
Loans and leases, net	0	22,171
Financial Liabilities:
Time deposits	641,517	753,045
Other deposits	6,151,761	5,691,518
Securities sold under agreements to repurchase	66,787	65,845
Other borrowings	125,700	274,238
Trust preferred debentures		18,483
Accrued interest payable	901	1,727
(Level 3)
Financial Assets:
Cash and cash equivalents	0	0
Fair Value	0
FHLB and ACBB stock	0	0
Accrued interest receivable	0	0
Loans and leases, net	5,028,734	5,204,130
Financial Liabilities:
Time deposits	0	0
Other deposits	0	0
Securities sold under agreements to repurchase	0	0
Other borrowings	0	0
Trust preferred debentures		0
Accrued interest payable	0	0
Carrying Amount
Financial Assets:
Cash and cash equivalents	63,107	388,462
Fair Value	284,009
FHLB and ACBB stock	10,996	16,382
Accrued interest receivable	22,597	32,025
Loans and leases, net	5,032,624	5,208,658
Financial Liabilities:
Time deposits	639,674	746,234
Other deposits	6,151,761	5,691,518
Securities sold under agreements to repurchase	66,787	65,845
Other borrowings	124,000	265,000
Trust preferred debentures		13,220
Accrued interest payable	901	1,727
Fair Value
Financial Assets:
Cash and cash equivalents	63,107	388,462
Fair Value	282,288
FHLB and ACBB stock	10,996	16,382
Accrued interest receivable	22,597	32,025
Loans and leases, net	5,028,734	5,226,301
Financial Liabilities:
Time deposits	641,517	753,045
Other deposits	6,151,761	5,691,518
Securities sold under agreements to repurchase	66,787	65,845
Other borrowings	125,700	274,238
Trust preferred debentures		18,483
Accrued interest payable	$ 901	$ 1,727