Loans and Allowance - Information regarding troubled debt restructurings by class (Details 8) (Loans Receivable, USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013 Loan	Jun. 30, 2012 Loan	Jun. 30, 2013 Loan	Jun. 30, 2012 Loan
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	3	3	17	11
Pre-Modification Recorded Balance	$ 279	$ 167	$ 1,491	$ 2,380
Post-Modification Recorded Balance	291	175	1,739	2,466
Construction / Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	1		3
Pre-Modification Recorded Balance	103		103
Post-Modification Recorded Balance	101		272
One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans	2	2	8	6
Pre-Modification Recorded Balance	176	63	416	1,103
Post-Modification Recorded Balance	190	71	434	1,169
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans				1
Pre-Modification Recorded Balance				1,068
Post-Modification Recorded Balance				1,083
Nonresidential and agricultural land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans			2	1
Pre-Modification Recorded Balance			935	40
Post-Modification Recorded Balance			935	40
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans		1	4	3
Pre-Modification Recorded Balance		104	37	169
Post-Modification Recorded Balance		104	98	174
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of Loans
Pre-Modification Recorded Balance
Post-Modification Recorded Balance