Loans Receivable, Net - Additional Information (Detail) - USD ($)			3 Months Ended		9 Months Ended		12 Months Ended
	May 02, 2016	Jul. 31, 2015	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest			$ 16,507,000		$ 16,507,000		$ 18,274,000
Financing receivables 90 days past due and still accruing			0		0
Impaired loans on non-accrual commercial real estate, multi-family, land, construction, commercial and industrial loans					250,000
Impaired loan portfolio total			34,907,000		34,907,000		38,372,000
Allocation in allowance for loan losses			269,000		269,000		1,339,000
Average balance of impaired loans			34,500,000	$ 46,200,000	34,300,000	$ 40,900,000
Troubled debt restructured loans			29,900,000		29,900,000		31,300,000
Troubled debt restructured loans with accrual interest			26,400,000		26,400,000		26,300,000
Non-accrual loan total troubled debt restructurings					3,500,000		4,900,000
Specific reserves to loans accruing troubled debt restructurings			30,000		30,000		262,000
Cape Bancorp, Inc. [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses	$ 0
Colonial American Bank [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan losses		$ 0
Residential Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest			7,017,000		7,017,000		$ 5,779,000
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount			3,700,000		3,700,000
Foreclosed property held			$ 1,800,000		$ 1,800,000