Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Contingency [Line Items]
Excess tax benefit	$ 301,000	$ 73,000
Amount for which no federal income tax provision has been made	6,000,000	6,000,000	$ 6,000,000
Unrecognized Tax Benefits	0
Charitable Contribution Carryforward	606,000
Charitable Contribution Carryforwards, deferred tax asset	$ 212,000
Charitable Contributions Carryforwards, Expiration Date	Dec. 31, 2021
Deferred Tax Assets Reversed		42,000
Accrued Interest Or Penalties	$ 0	$ 0
State and Local Jurisdiction [Member]
Income Tax Contingency [Line Items]
Operating Loss Carryforwards	$ 41,962,000
Operating Loss Carryforwards, Expiration Date	Dec. 31, 2018
Minimum [Member]
Income Tax Contingency [Line Items]
Open tax years	2013
Maximum [Member]
Income Tax Contingency [Line Items]
Open tax years	2015
Fox Chase Bank [Member]
Income Tax Contingency [Line Items]
Business combination, deferred tax assets	$ 1,200,000