Business Combination - Additional Information (Detail) $ in Thousands				3 Months Ended								12 Months Ended
	Nov. 30, 2016 USD ($)	May 02, 2016 USD ($)	Jul. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Mar. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Mar. 31, 2015 USD ($)	Dec. 31, 2016 USD ($) Property	Dec. 31, 2015 USD ($)	Mar. 11, 2016 USD ($)
Business Acquisition [Line Items]
Merger related expenses				$ 6,632	$ 1,311	$ 7,189	$ 1,402	$ 614	$ 1,030	$ 184	$ 50	$ 16,534	$ 1,878
Control payments												5,500
Professional fees												5,700
IT expenses												5,100
Miscellaneous expenses												$ 200
Number of properties in lease agreements | Property												8
Retail Branch
Business Acquisition [Line Items]
Deposit premiums			$ 340
Percentage of deposits			2.50%
Percentage of deposit, premium contingent on core deposit (up to)			1.00%
Purchase accounting adjustments, assets														$ 16,817
Purchase accounting adjustments, loans														9
Purchase accounting adjustments, deposits														$ 16,957
Cape Bancorp, Inc.
Business Acquisition [Line Items]
Purchase accounting adjustments, assets		$ 1,519,615
Purchase accounting adjustments, loans		1,156,807
Purchase accounting adjustments, deposits		1,248,367
Consideration paid		196,403
Cash consideration paid for outstanding warrants and fractional shares		$ 30,500
Ocean Shore Holdings Co.
Business Acquisition [Line Items]
Purchase accounting adjustments, assets	$ 995,880
Purchase accounting adjustments, loans	774,046
Purchase accounting adjustments, deposits	875,073
Consideration paid	180,732
Cash consideration paid for outstanding warrants and fractional shares	$ 28,400