Business Combinations - Summary of Estimated Fair Values of Assets Acquired and Liabilities Assumed at Date of Acquisition (Detail) - USD ($) $ in Thousands	Nov. 30, 2016	May 02, 2016	Mar. 31, 2017	Dec. 31, 2016
Liabilities assumed:
Goodwill recorded in the merger			$ 147,815	$ 145,064
Ocean Shore Holdings Co.
Business Acquisition [Line Items]
Total Purchase Price:	$ 180,732
Assets acquired:
Cash and cash equivalents	60,871
Securities and Federal Home Loan Bank Stock	94,133
Loans	774,046
Premises and equipment	15,068
Other real estate owned	1,023
Deferred tax asset	6,680
Other assets	35,364
Core deposit intangible	7,506
Total assets acquired	994,691
Liabilities assumed:
Deposits	(875,073)
Borrowings	(3,694)
Other liabilities	(16,166)
Total liabilities assumed	(894,933)
Net assets acquired	99,758
Goodwill recorded in the merger	80,974
Ocean Shore Holdings Co. | Book Value
Assets acquired:
Cash and cash equivalents	60,871
Securities and Federal Home Loan Bank Stock	94,109
Loans	790,396
Premises and equipment	11,696
Other real estate owned	1,090
Deferred tax asset	5,587
Other assets	35,369
Core deposit intangible	348
Total assets acquired	999,466
Liabilities assumed:
Deposits	(874,301)
Borrowings	(3,694)
Other liabilities	(17,629)
Total liabilities assumed	(895,624)
Net assets acquired	103,842
Ocean Shore Holdings Co. | Purchase Accounting Adjustments
Assets acquired:
Securities and Federal Home Loan Bank Stock	24
Specific credit fair value on credit impaired loans	(2,062)
General credit fair value	(8,127)
Interest rate fair value	(5,779)
Reverse allowance for loan losses	3,265
Reverse net deferred fees, premiums and discounts	(3,647)
Premises and equipment	3,372
Other real estate owned	(67)
Deferred tax asset	1,093
Other assets	(5)
Core deposit intangible	7,158
Total assets acquired	(4,775)
Liabilities assumed:
Deposits	(772)
Borrowings	0
Other liabilities	1,463
Total liabilities assumed	691
Net assets acquired	$ (4,084)
Cape Bancorp, Inc.
Business Acquisition [Line Items]
Total Purchase Price:		$ 196,403
Assets acquired:
Cash and cash equivalents		30,025
Securities and Federal Home Loan Bank Stock		218,938
Loans		1,156,807
Premises and equipment		25,999
Other real estate owned		1,935
Deferred tax asset		17,479
Other assets		61,793
Core deposit intangible		3,718
Total assets acquired		1,516,694
Liabilities assumed:
Deposits		(1,248,367)
Borrowings		(124,466)
Other liabilities		(12,223)
Total liabilities assumed		(1,385,056)
Net assets acquired		131,638
Goodwill recorded in the merger		64,765
Cape Bancorp, Inc. | Book Value
Assets acquired:
Cash and cash equivalents		30,025
Securities and Federal Home Loan Bank Stock		218,577
Loans		1,169,568
Premises and equipment		27,972
Other real estate owned		2,343
Deferred tax asset		9,407
Other assets		61,793
Core deposit intangible		831
Total assets acquired		1,520,516
Liabilities assumed:
Deposits		(1,247,688)
Borrowings		(123,587)
Other liabilities		(7,611)
Total liabilities assumed		(1,378,886)
Net assets acquired		141,630
Cape Bancorp, Inc. | Purchase Accounting Adjustments
Assets acquired:
Securities and Federal Home Loan Bank Stock		361
Specific credit fair value on credit impaired loans		(5,859)
General credit fair value		(20,545)
Interest rate fair value		1,888
Reverse allowance for loan losses		9,931
Reverse net deferred fees, premiums and discounts		1,824
Premises and equipment		(1,973)
Other real estate owned		(408)
Deferred tax asset		8,072
Other assets		0
Core deposit intangible		2,887
Total assets acquired		(3,822)
Liabilities assumed:
Deposits		(679)
Borrowings		(879)
Other liabilities		(4,612)
Total liabilities assumed		(6,170)
Net assets acquired		$ (9,992)