Loans Receivable, Net - PCI Loans Acquired (Detail) - USD ($) $ in Thousands	Dec. 01, 2016	May 02, 2016	Jul. 31, 2015
Ocean Shore Holdings Co.
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest	$ 7,385
Contractual cash flows not expected to be collected (non-accretable discount)	(4,666)
Expected cash flows to be collected at acquisition	2,719
Interest component of expected cash flows (accretable yield)	(401)
Fair value of acquired loans	$ 2,318
Cape Bancorp, Inc.
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest		$ 21,345
Contractual cash flows not expected to be collected (non-accretable discount)		(12,387)
Expected cash flows to be collected at acquisition		8,958
Interest component of expected cash flows (accretable yield)		(576)
Fair value of acquired loans		$ 8,382
Colonial American Bank
Certain Loans Acquired in Transfer Not Accounted for as Debt Securities Acquired During Period [Line Items]
Contractually required principal and interest			$ 3,263
Contractual cash flows not expected to be collected (non-accretable discount)			(1,854)
Expected cash flows to be collected at acquisition			1,409
Interest component of expected cash flows (accretable yield)			(109)
Fair value of acquired loans			$ 1,300