Credit Quality of Loans and the Allowance for Loan Losses (Schedule of Activity in Allowance for Loan Losses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Activity in the allowance for loan losses by portfolio segment
Beginning balance	$ 2,769	$ 2,819
Provision charged to expense	233	8
Losses charged off	(654)	(260)
Recoveries	1	7
Ending balance	2,349	2,574
One-to-four family residential [Member]
Activity in the allowance for loan losses by portfolio segment
Beginning balance	1,533	1,017
Provision charged to expense	30	(135)
Losses charged off	(654)
Recoveries	1	7
Ending balance	910	889
All other mortgage loans [Member]
Activity in the allowance for loan losses by portfolio segment
Beginning balance	885	1,526
Provision charged to expense	170	127
Losses charged off		(260)
Recoveries
Ending balance	1,055	1,393
Commercial business loans [Member]
Activity in the allowance for loan losses by portfolio segment
Beginning balance	343	271
Provision charged to expense	37	17
Losses charged off
Recoveries
Ending balance	380	288
Consumer loans [Member]
Activity in the allowance for loan losses by portfolio segment
Beginning balance	8	5
Provision charged to expense	(4)	(1)
Losses charged off
Recoveries
Ending balance	$ 4	$ 4

Amount of recovery of financing receivables doubtful of collection that were previously charged off.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 11B

-Subparagraph (c)(4)

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Amount of direct write-downs of financing receivables charged against the allowance.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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-Name Staff Accounting Bulletin (SAB)

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-Section L

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Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value.

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