Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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+ Details

Related Party Transactions - Additional Information (Detail)	1 Months Ended				12 Months Ended
	Jul. 31, 2020 USD ($)	Feb. 29, 2020 USD ($)	Nov. 30, 2018 USD ($) ft²	Mar. 31, 2018 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Related Party Transactions [Line Items]
Additional future lease payments					$ 3,818,000
Operating lease costs					271,000	$ 348,000
Rochlin Organization ("TRO") [Member]
Related Party Transactions [Line Items]
Brokerage cash commissions	$ 406,000	$ 135,000	$ 40,000	$ 107,000
Additional future lease payments	$ 21,000,000	$ 4,500,000
Aggregate contractual rents			$ 670,000	$ 3,600,000
Additional premises expansion \| ft²			30,000
Lighthouse Sixty, LP [Member]
Related Party Transactions [Line Items]
Operating lease costs					$ 27,000
Lease expiration year					2020