Merger and Acquisition - Additional Information (Detail) $ / shares in Units, shares in Millions		3 Months Ended	6 Months Ended
	Nov. 30, 2023 USD ($) Location Facility $ / shares shares	Jun. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)
Business Acquisition [Line Items]
Allowance for Credit Losses on Acquired Loans		$ 2,300,000	$ 2,300,000
Goodwill		58,806,000	58,806,000		$ 56,968,000
Allowance for credit losses		26,288,000	26,288,000	$ 23,842,000	$ 23,767,000	$ 10,228,000	$ 10,526,000	$ 4,666,000
Partners Bancorp [Member]
Business Acquisition [Line Items]
Merger completion date	Nov. 30, 2023
Business acquisition,share price | $ / shares	$ 1.15
Number of shares of common stock issued | shares	20.7
Percentage of outstanding common shares post-merger	55.40%
Total fair value consideration	$ 135,779,000
Allowance for Credit Losses on Acquired Loans		2,300,000
Goodwill	22,964,000	$ 1,838,000	$ 1,838,000
Fair value of discount amortized over estimated life of investments	921,000
Loans acquired from Partners	1,300,000,000
Fair value of acquistion loan	$ 5,900,000
Number of facility leases | Facility	11
Number of locations | Location	13
Fair value adjustment of long term borrowings	$ 0
Partners Bancorp [Member] | PCD Loan [Member]
Business Acquisition [Line Items]
Goodwill	$ 2,300,000
Acquired percentage of loans	34.00%
Loans acquired from Partners	$ 435,700,000
Contractual amounts receivable gross	435,700,000
Estimated contractual amounts uncollectible	2,458,000
Fair value of acquistion loan	406,400,000
Partners Bancorp [Member] | Non PCD Loans [Member]
Business Acquisition [Line Items]
Allowance for credit losses	9,700,000
Partners Bancorp [Member] | Common Stock [Member]
Business Acquisition [Line Items]
Fair value of common stock issued	133,800,000
Partners Bancorp [Member] | Restricted Stock [Member]
Business Acquisition [Line Items]
Fair value of common stock issued	$ 2,000,000