Loans Receivable - Troubled Debt Restructuring - Payment Defaults (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan	Sep. 30, 2015 USD ($) loan	Sep. 30, 2014 USD ($) loan
Financing Receivable, Modifications [Line Items]
Troubled Debt Restructuring Charge Off			$ 0.0000	$ 0
Troubled Debt Restructuring Charge Off	$ 127,000	$ 205,000		246,000
Financing Receivable Pre Modification Recorded Investment	338,000	555,000	$ 401,000	$ 695,000
Loans by class modified as TDRs with payment default
Number of loans | loan			1	1
Financing Receivable Post Modification Recorded Investment	$ 211,000	$ 350,000	$ 274,000	$ 449,000
Number Of Loans | loan	5	2	6	5
Financing Receivable, Modifications, Subsequent Default, Recorded Investment			$ 27,000	$ 28,000
One-to-four family residential real estate loans [Member]
Financing Receivable, Modifications [Line Items]
Financing Receivable Pre Modification Recorded Investment	$ 338,000	$ 345,000	401,000	485,000
Loans by class modified as TDRs with payment default
Financing Receivable Post Modification Recorded Investment	$ 211,000	$ 345,000	$ 274,000	$ 444,000
Number Of Loans | loan	5	1	6	4