Credit Quality of Loans and Allowance for Loan Losses (Impaired Loans By Loan Portfolio Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012	Jun. 30, 2012
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	$ 1,902		$ 1,902		$ 1,794
Impaired Loans with No Allowance: Unpaid Principal Balance	1,902		1,902		1,857
Impaired Loans with No Allowance: Average Recorded Investment	2,352	1,095	1,805	797
Impaired Loans with No Allowance: Interest Income	32	23	102	44
Impaired Loans with Allowance: Recorded Investment	6,039		6,039		2,913
Impaired Loans with Allowance: Unpaid Principal Balance	6,089		6,089		2,913
Impaired Loans with Allowance: Related Allowance	1,141		1,141		773
Impaired Loans with Allowance: Average Recorded Investment	5,456	2,225	6,040	2,011
Impaired Loans with Allowance: Interest Income	16	29	50	73
Total Impaired Loans: Recorded Investment	7,941		7,941		4,707
Total Impaired Loans: Unpaid Principal Balance	7,991		7,991		4,770
Total Impaired Loans, Average Recorded Investment	7,808	3,320	7,845		2,808
Total Impaired Loans, Interest Income Recognized	48	52	152	117
Residential mortgage portfolio [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	643		643		213
Impaired Loans with No Allowance: Unpaid Principal Balance	643		643		276
Impaired Loans with No Allowance: Average Recorded Investment	915	213	432	213
Impaired Loans with No Allowance: Interest Income	14		32
Impaired Loans with Allowance: Recorded Investment	2,437		2,437		200
Impaired Loans with Allowance: Unpaid Principal Balance	2,487		2,487		200
Impaired Loans with Allowance: Related Allowance	363		363		10
Impaired Loans with Allowance: Average Recorded Investment	1,951	224	2,243	106
Impaired Loans with Allowance: Interest Income	11	2	26	4
Total Impaired Loans: Recorded Investment	3,080		3,080		413
Total Impaired Loans: Unpaid Principal Balance	3,130		3,130		476
Total Impaired Loans, Average Recorded Investment	2,866	437	2,675		319
Total Impaired Loans, Interest Income Recognized	25	2	58	4
Nonresidential mortgage [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment	1,259		1,259		1,148
Impaired Loans with No Allowance: Unpaid Principal Balance	1,259		1,259		1,148
Impaired Loans with No Allowance: Average Recorded Investment	1,360	736	1,265	535
Impaired Loans with No Allowance: Interest Income	15	19	57	40
Impaired Loans with Allowance: Recorded Investment	1,082		1,082		648
Impaired Loans with Allowance: Unpaid Principal Balance	1,082		1,082		648
Impaired Loans with Allowance: Related Allowance	291		291		208
Impaired Loans with Allowance: Average Recorded Investment	985	651	1,015	819
Impaired Loans with Allowance: Interest Income	5	6	13	19
Total Impaired Loans: Recorded Investment	2,341		2,341		1,796
Total Impaired Loans: Unpaid Principal Balance	2,341		2,341		1,796
Total Impaired Loans, Average Recorded Investment	2,345	1,387	2,280		1,354
Total Impaired Loans, Interest Income Recognized	20	25	70	59
Commercial construction [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Recorded Investment	1,063		1,063		1,075
Impaired Loans with Allowance: Unpaid Principal Balance	1,063		1,063		1,075
Impaired Loans with Allowance: Related Allowance	335		335		365
Impaired Loans with Allowance: Average Recorded Investment	1,063	356	1,068	119
Impaired Loans with Allowance: Interest Income		5		5
Total Impaired Loans: Recorded Investment	1,063		1,063		1,075
Total Impaired Loans: Unpaid Principal Balance	1,063		1,063		1,075
Total Impaired Loans, Average Recorded Investment	1,063	356	1,068		119
Total Impaired Loans, Interest Income Recognized		5		5
Multi-family [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Recorded Investment					433
Impaired Loans with No Allowance: Unpaid Principal Balance					433
Impaired Loans with No Allowance: Average Recorded Investment		146		49
Impaired Loans with No Allowance: Interest Income		4		4
Impaired Loans with Allowance: Recorded Investment	886		886		428
Impaired Loans with Allowance: Unpaid Principal Balance	886		886		428
Impaired Loans with Allowance: Related Allowance	149		149		155
Impaired Loans with Allowance: Average Recorded Investment	886	431	885	432
Impaired Loans with Allowance: Interest Income		6	4	18
Total Impaired Loans: Recorded Investment	886		886		861
Total Impaired Loans: Unpaid Principal Balance	886		886		861
Total Impaired Loans, Average Recorded Investment	886	577	885		481
Total Impaired Loans, Interest Income Recognized		10	4	22
Home Equity Loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with Allowance: Average Recorded Investment			257
Impaired Loans with Allowance: Interest Income			4
Total Impaired Loans, Average Recorded Investment			257
Total Impaired Loans, Interest Income Recognized			4
Commercial loans [Member]
Financing Receivable, Impaired [Line Items]
Impaired Loans with No Allowance: Average Recorded Investment	77		108
Impaired Loans with No Allowance: Interest Income	3		13
Impaired Loans with Allowance: Recorded Investment	571		571		562
Impaired Loans with Allowance: Unpaid Principal Balance	571		571		562
Impaired Loans with Allowance: Related Allowance	3		3		35
Impaired Loans with Allowance: Average Recorded Investment	571	563	572	535
Impaired Loans with Allowance: Interest Income		10	3	27
Total Impaired Loans: Recorded Investment	571		571		562
Total Impaired Loans: Unpaid Principal Balance	571		571		562
Total Impaired Loans, Average Recorded Investment	648	563	680		535
Total Impaired Loans, Interest Income Recognized	$ 3	$ 10	$ 16	$ 27