Subsequent Event - Additional Information (Detail) $ / shares in Units, $ in Millions		12 Months Ended
	Jan. 05, 2016 USD ($) $ / shares	Dec. 31, 2015 Banking_Office Loan_Office
Cape Bancorp [Member] | Central and Southern New Jersey Market [Member]
Subsequent Event [Line Items]
Number of full-service banking offices | Banking_Office		22
Number of loan offices | Loan_Office		5
Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock exchanged for each share of Cape common stock	0.6375
Subsequent Event [Member] | Cape Bancorp [Member]
Subsequent Event [Line Items]
Cost of acquisition | $	$ 208.1
Cash to be received for each share of Cape common stock | $ / shares	$ 2.25