Business Combinations - Additional Information (Detail) $ in Thousands				3 Months Ended
	Nov. 30, 2016 USD ($)	May 02, 2016 USD ($)	Mar. 11, 2016 USD ($)	Mar. 31, 2017 Property
Cape Bancorp, Inc.
Business Acquisition [Line Items]
Purchase accounting adjustments, assets		$ 1,516,694
Purchase accounting adjustments, loans		1,156,807
Purchase accounting adjustments, deposits		1,248,367
Total consideration paid		196,403
Cash consideration		$ 30,500
Number of properties in lease agreement | Property				8
Ocean Shore Holdings Co.
Business Acquisition [Line Items]
Purchase accounting adjustments, assets	$ 994,691
Purchase accounting adjustments, loans	774,046
Purchase accounting adjustments, deposits	875,073
Total consideration paid	180,732
Cash consideration	$ 28,400
Retail Branch
Business Acquisition [Line Items]
Deposit premium			$ 340
Percentage of core deposits			2.50%
Percentage of deposit premium, contingent on the core deposit			1.00%
Premium contingent on core deposit (in days)			75 days
Purchase accounting adjustments, assets			$ 16,817
Purchase accounting adjustments, loans			9
Purchase accounting adjustments, deposits			$ 16,957