Loans Receivable, Net - Additional Information (Detail) - USD ($)		3 Months Ended		6 Months Ended		12 Months Ended
	May 02, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest		$ 16,261,000		$ 16,261,000		$ 13,566,000
Impaired loans on non-accrual commercial real estate, multi-family, land, construction, commercial and industrial loans				250,000
Impaired loan portfolio total		41,290,000		41,290,000		31,042,000
Allocation in allowance for loan losses		616,000		616,000		510,000
Average balance of impaired loans		37,900,000	$ 35,600,000	34,200,000	$ 34,400,000
Troubled debt restructured loans		35,400,000		35,400,000		30,500,000
Troubled debt restructured loans with accrual interest		34,100,000		34,100,000		27,000,000
Non-accrual loan total troubled debt restructurings				1,300,000		3,500,000
Specific reserves to loans accruing troubled debt restructurings		0		0		510,000
Cape Bancorp, Inc.
Accounts, Notes, Loans and Financing Receivable [Line Items]
Allowance for loan and lease losses, loans acquired	$ 0
Residential Real Estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans with non-accrual of interest		7,936,000		7,936,000		$ 8,126,000
Recorded investment in mortgage and consumer loans collateralized, foreclosure amount		5,600,000		5,600,000
Foreclosed property held		$ 811,000		$ 811,000