Loans and Allowance - Information regarding newly restructured troubled debt by type of modification (Details 9) (Loans Receivable, USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term	305	1,604
Combination	1,434	694
Total Modifications	1,739	2,298
Construction / Land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term	101
Combination	171
Total Modifications	272
One-to-four family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term	204	529
Combination	230	559
Total Modifications	434	1,088
Multi-family residential
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term		1,075
Combination
Total Modifications		1,075
Nonresidential and agricultural land
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term
Combination	935
Total Modifications	935
Commercial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term
Combination	98	135
Total Modifications	98	135
Consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Only
Term
Combination
Total Modifications