Financing Receivables - Credit risk profile by internally assigned grade (Details 3) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Originated Loans Receivable
Financing Receivable, Recorded Investment [Line Items]
Originated loans	$ 227,989	$ 226,891
Originated Loans Receivable | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	157,045	157,883
Originated Loans Receivable | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	14,054	15,309
Originated Loans Receivable | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans	7,040	7,141
Originated Loans Receivable | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans	49,064	45,788
Originated Loans Receivable | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans	786	770
Originated Loans Receivable | Pass
Financing Receivable, Recorded Investment [Line Items]
Originated loans	224,582	222,707
Originated Loans Receivable | Pass | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	155,255	155,364
Originated Loans Receivable | Pass | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	13,959	15,214
Originated Loans Receivable | Pass | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans	7,040	7,141
Originated Loans Receivable | Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans	47,542	44,218
Originated Loans Receivable | Pass | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans	786	770
Originated Loans Receivable | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Special Mention | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Special Mention | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Special Mention | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Special Mention | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Substandard
Financing Receivable, Recorded Investment [Line Items]
Originated loans	3,407	4,184
Originated Loans Receivable | Substandard | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	1,790	2,519
Originated Loans Receivable | Substandard | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans	95	95
Originated Loans Receivable | Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Substandard | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans	1,522	1,570
Originated Loans Receivable | Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Doubtful | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss | Construction
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss | Commercial
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Originated Loans Receivable | Loss | Consumer
Financing Receivable, Recorded Investment [Line Items]
Originated loans
Purchased Loans Receivable
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	108,619	114,324
Purchased Loans Receivable | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	74,942	78,353
Purchased Loans Receivable | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	5,956	7,496
Purchased Loans Receivable | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	26,263	26,967
Purchased Loans Receivable | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	1,458	1,508
Purchased Loans Receivable | Pass
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	100,772	108,472
Purchased Loans Receivable | Pass | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	71,505	74,410
Purchased Loans Receivable | Pass | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	5,956	7,496
Purchased Loans Receivable | Pass | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Pass | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	21,877	25,076
Purchased Loans Receivable | Pass | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	1,434	1,490
Purchased Loans Receivable | Special Mention
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Special Mention | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Special Mention | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Special Mention | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Special Mention | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Special Mention | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Substandard
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	7,847	5,852
Purchased Loans Receivable | Substandard | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	3,437	3,943
Purchased Loans Receivable | Substandard | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Substandard | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Substandard | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	4,386	1,891
Purchased Loans Receivable | Substandard | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans	24	18
Purchased Loans Receivable | Doubtful
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Doubtful | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Doubtful | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Doubtful | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Doubtful | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Doubtful | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss | One-to-four Family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss | Multi-family Residential
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss | Construction
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss | Commercial
Financing Receivable, Recorded Investment [Line Items]
Purchased loans
Purchased Loans Receivable | Loss | Consumer
Financing Receivable, Recorded Investment [Line Items]
Purchased loans