Fair Value Measurements and Fair Value of Financial Instruments (Narrative) (Details) (USD $)	6 Months Ended	12 Months Ended
	Dec. 31, 2012 loan	Jun. 30, 2012 loan
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, Recorded Investment	$ 8,193,000	$ 4,707,000
Impaired Financing Receivable, Related Allowance	1,166,000	773,000
Significant Unobservable Inputs (Level 3) [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	362,742,000	341,263,000
Fair Value [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans Receivable, Fair Value Disclosure	362,742,000	341,263,000
Fair Value, Measurements, Recurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Assets, Level 1 to Level 2 Transfers, Amount	0	0
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, Recorded Investment	6,300,000	3,100,000
Impaired Financing Receivable, Related Allowance	1,200,000	773,000
Residential mortgage portfolio [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio	11	3
Impaired Financing Receivable, Recorded Investment	2,816,000	413,000
Impaired Financing Receivable, Related Allowance	303,000	10,000
Nonresidential mortgage [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Impaired Financing Receivable, Recorded Investment	2,349,000	1,796,000
Impaired Financing Receivable, Related Allowance	341,000	208,000
Nonresidential mortgage [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio	4	5
Multi-family [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio	2
Impaired Financing Receivable, Recorded Investment	888,000	861,000
Impaired Financing Receivable, Related Allowance	142,000	155,000
Multi-family [Member] | Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio		1
Commercial loans [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio	3	1
Impaired Financing Receivable, Recorded Investment	688,000	562,000
Impaired Financing Receivable, Related Allowance	3,000	35,000
Commercial construction [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Number of Loans in Portfolio	2	1
Impaired Financing Receivable, Recorded Investment	1,066,000
Impaired Financing Receivable, Related Allowance	$ 303,000	$ 365,000