Consolidated Statements of Changes in Shareholders' Equity (Unaudited) - USD ($) $ in Thousands		Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive 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			25			39	64
Tax benefit of stock based compensation			6				6
Dividends declared	[1]			(693)			(693)
Net income				3,586			3,586
Other comprehensive (loss) income, net of taxes					301		301
Balance at Dec. 31, 2014		431	11,239	54,198	(749)	(655)	64,464
Balance at Jun. 30, 2015		431	11,220	56,696	(798)	(629)	66,920
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Options exercised			33			50	83
Tax benefit of stock based compensation			6				6
Dividends declared	[1]			(715)			(715)
Net income				4,470			4,470
Other comprehensive (loss) income, net of taxes					(14)		(14)
Balance at Dec. 31, 2015		$ 431	$ 11,259	$ 60,451	$ (812)	$ (579)	$ 70,750

[1] Dividends declared were $0.37 per share and $0.36 per share for the six months ended December 31, 2015 and 2014. This is based on total number of shares outstanding. However, Greene County Bancorp, MHC, the owner of 54.5% of the Company's shares outstanding at December 31, 2015, waived its right to receive dividends during the six months ended December 31, 2015 and 2014. 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.