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Summary of Significant Accounting Policies - Additional Information (Detail)	6 Months Ended
	Jun. 30, 2025 Integer	Aug. 23, 2024	Mar. 05, 2007 Branches
Description Of Organization And Summary Of Significant Accounting Policies [Line Items]
Entity incorporation date of incorporation	Mar. 05, 2007
State in which the entity was incorporated	NJ
Year of incorporation	2007
Operations commencement date	Apr. 23, 2007
Number of branches owned by the entity \| Branches			35
Number of employees	251
Number of full time employees	247
Cornerstone Bank [Member]
Description Of Organization And Summary Of Significant Accounting Policies [Line Items]
Percentage of outstanding common stock acquired		100.00%
New Jersey State Chartered Banking Institution [Member]
Description Of Organization And Summary Of Significant Accounting Policies [Line Items]
State in which the entity was incorporated	NJ