Regulatory Capital Requirements - Components of Regulatory Capital (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	$ 251,804	$ 244,245	$ 247,104	$ 240,135
Accumulated other comprehensive income	(12,938)	(19,220)	$ (16,108)	$ (19,998)
Home Savings [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	230,771	220,872
Accumulated other comprehensive income	12,954	19,236
Intangible assets	(10)	(12)
Disallowed deferred tax assets	(14,821)	(15,610)
Tier 1 Capital	228,894	224,486
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets	16,775	16,211
Total risk-based capital	245,669	240,697
United Community [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	251,804	244,245
Accumulated other comprehensive income	12,938	19,220
Intangible assets	(10)	(12)
Disallowed deferred tax assets	(17,254)	(17,950)
Tier 1 Capital	247,478	245,503
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets	16,758	16,229
Total risk-based capital	$ 264,236	$ 261,732