Summary of Significant Accounting Policies - Schedule of Earnings Per Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income available to common stock	$ 1,266	$ 1,021	$ 1,021	$ 1,207	$ 618	$ 824	$ 770	$ 761	$ 4,515	$ 2,974	$ 3,016
Average number of shares issued (in shares)									8,019,352	7,970,174	7,950,748
Less: average unallocated ESOP shares (in shares)									(340,868)	(383,264)	(425,660)
Less: average treasury stock (in shares)									(2,371,873)	(2,142,150)	(1,631,852)
Less: average unvested restricted stock awards (in shares)									(2,460)	(29,909)	(86,259)
Average number of basic shares outstanding (in shares)	5,327,928	5,313,484	5,300,289	5,274,900	5,372,849	5,389,400	5,401,349	5,495,803	5,304,151	5,414,851	5,806,977
Average number of diluted shares outstanding (in shares)	5,458,803	5,439,177	5,443,078	5,401,982	5,519,703	5,560,481	5,527,472	5,584,946	5,435,761	5,548,151	5,888,591
Basic earnings per share (in shares)	$ 0.24	$ 0.19	$ 0.19	$ 0.23	$ 0.12	$ 0.15	$ 0.14	$ 0.14	$ 0.85	$ 0.55	$ 0.52
Diluted earnings per share (in shares)	$ 0.23	$ 0.19	$ 0.19	$ 0.22	$ 0.11	$ 0.15	$ 0.14	$ 0.14	$ 0.83	$ 0.54	$ 0.51
Anti-dilutive securities excluded from computation of earnings per share (in shares)									10,000	0	0
Restricted Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Plus: dilutive unvested restricted stock awards (in shares)									1,487	20,942	37,545
Stock Options
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Plus: dilutive unvested restricted stock awards (in shares)									130,123	112,358	44,069