Regulatory Capital Requirements - Components of Regulatory Capital (Detail) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	$ 254,075	$ 244,245	$ 236,462	$ 240,135
Accumulated other comprehensive income	(8,640)	(19,220)
Home Savings [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	240,638	220,872
Accumulated other comprehensive income	8,656	19,236
Intangible assets	(4)	(12)
Disallowed deferred tax assets	(12,180)	(15,610)
Tier 1 Capital	237,110	224,486
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets	17,159	16,211
Total risk-based capital	254,269	240,697
United Community [Member]
Compliance With Regulatory Capital Requirements Under Banking Regulations [Line Items]
Total shareholders' equity	254,075	244,245
Accumulated other comprehensive income	8,640	19,220
Intangible assets	(937)	(12)
Disallowed deferred tax assets	(14,686)	(17,950)
Tier 1 Capital	247,092	245,503
Allowance for loan losses and allowance for unfunded lending commitments limited to 1.25% of total risk-weighted assets	17,172	16,229
Total risk-based capital	$ 264,264	$ 261,732