Merger and Acquisition - Allocation of Purchase Price for Merger (Detail) - USD ($) $ in Thousands	Nov. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Calculated Fair Value of Liabilities Assumed
Operating Lease Liabilities		$ 15,109	$ 10,219
Goodwill From the Merger		$ 56,968	$ 35,842	$ 35,842
Partners Bancorp [Member]
Business Acquisition [Line Items]
Total consideration	$ 135,779
Calculated Fair Value of Assets Acquired
Premises and equipment	3,045
Core deposit intangible	25,344
Calculated Fair Value of Liabilities Assumed
Subordinated debt	1,179
Net Assets Acquired	114,653
Goodwill From the Merger	21,126
Partners Bancorp [Member] | Subject to Change [Member]
Business Acquisition [Line Items]
Total consideration	135,779
Calculated Fair Value of Assets Acquired
Cash and cash equivalents	34,586
Federal funds sold	7,159
Securities available for sale	123,440
Loans, net of ACL	1,240,334
Premises and equipment	15,504
Right-of-use asset	6,042
Core deposit intangible	25,344
Deferred taxes	14,466
Investments in restricted bank stock	6,763
Accrued interest receivable and other assets	29,884
Total Assets Acquired	1,503,522
Calculated Fair Value of Liabilities Assumed
Deposits	1,299,867
Long term borrowings	55,292
Subordinated debt	21,078
Operating Lease Liabilities	6,908
Other liabilities	5,724
Total Liabilities Assumed	1,388,869
Net Assets Acquired	114,653
Goodwill From the Merger	$ 21,126