Allowance for Loan Losses Schedule of Troubled Debt Restructure Defaults (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Schedule of Troubled Debt Restructure Defaults [Line Items]
Financing Receivable Modification Defaults Number of Contracts	1	6
Financing Receivable Modifications Defaulted in Current Period, Recorded Investment	$ 69	$ 870
One-to-four family residential
Schedule of Troubled Debt Restructure Defaults [Line Items]
Financing Receivable Modification Defaults Number of Contracts	1	5
Financing Receivable Modifications Defaulted in Current Period, Recorded Investment	69	573
Commercial real estate - owner occupied
Schedule of Troubled Debt Restructure Defaults [Line Items]
Financing Receivable Modification Defaults Number of Contracts	0	1
Financing Receivable Modifications Defaulted in Current Period, Recorded Investment	$ 0	$ 297