Parent Company Financial Statements - Condensed Statements of Financial Condition (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Assets
Cash and deposits with banks	$ 27,690	$ 20,528
Total cash and cash equivalents	45,887	35,910	$ 32,980	$ 77,331
Other assets	33,182	29,870
Total assets	2,191,345	1,987,989
Liabilities and Shareholders' Equity
Total liabilities	1,941,539	1,743,744
Total shareholders' equity	249,806	244,245	240,135	175,074
Total liabilities and shareholders’ equity	2,191,345	1,987,989
Parent Company [Member]
Assets
Cash and deposits with banks	25,924	21,163
Total cash and cash equivalents	25,924	21,163	$ 20,764	$ 28,906
Other assets	2,878	2,395
Total assets	250,459	244,431
Liabilities and Shareholders' Equity
Accrued expenses and other liabilities	653	186
Total liabilities	653	186
Total shareholders' equity	249,806	244,245
Total liabilities and shareholders’ equity	250,459	244,431
Parent Company [Member] | Home Savings [Member]
Assets
Investment in subsidiary	216,475	$ 220,873
Parent Company [Member] | HSB Capital LLC [Member]
Assets
Investment in subsidiary	3,014
Parent Company [Member] | HSB Insurance LLC [Member]
Assets
Investment in subsidiary	$ 2,168