Consolidated Statements of Changes in Shareholders' Equity - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income/(Loss) [Member]	Treasury Stock [Member]	Total
Balance at Jun. 30, 2014		$ 431	$ 11,208	$ 51,305	$ (1,050)	$ (694)	$ 61,200
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Options exercised			(4)			65	61
Tax benefit of stock based compensation			16				16
Dividends declared	[1]			(1,798)			(1,798)
Net income				7,189			7,189
Other comprehensive income, net of taxes					252		252
Balance at Jun. 30, 2015		431	11,220	56,696	(798)	(629)	66,920
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Options exercised			76			117	193
Tax benefit of stock based compensation			6				6
2-for-1 stock split	[2]	430	(430)				0
Dividends declared	[1]			(1,854)			(1,854)
Net income				8,963			8,963
Other comprehensive income, net of taxes					73		73
Balance at Jun. 30, 2016		$ 861	$ 10,872	$ 63,805	$ (725)	$ (512)	$ 74,301

[1] Dividends declared were $0.37 per share and $0.36 per share for the years ended June 30, 2016 and 2015, adjusted for 2-for-1 stock split. This is based on total number of shares outstanding. However, Greene County Bancorp, MHC, the owner of 54.4% of the Company's shares outstanding at June 30, 2016, waived its right to receive dividends declared during the quarters ended March 31, 2016, December 31, 2015, September 30, 2015, June 30, 2015, December 31, 2014, and September 30, 2014. Dividends were paid to the MHC during the quarters ended June 30, 2016 and March 31, 2015. The MHC's ability to waive the receipt of dividends is dependent upon annual approval of its members as well as receiving the non-objection of the Federal Reserve Board.

[2] On March 15, 2016, the Company issued an additional 4,305,670 shares at a par value of $0.10 per share as a result of the payment of a 2-for-1 stock split.