Fair Value of Financial Instruments (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Quantitative information about level 3 of fair value measurements for financial instruments
Other real estate owned	1,037	$ 1,186	$ 2,258
Real estate loans: Commercial non-owner occupied | Collateral analysis | Minimum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	0.00%
Real estate loans: One-to-four family | Collateral analysis | Minimum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	0.00%
Real estate loans: Land | Collateral analysis | Minimum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	0.00%
Non-recurring basis | Fair Value Measurement Using: Level 3
Quantitative information about level 3 of fair value measurements for financial instruments
Collateral dependent impaired loans	921
Other real estate owned	1,037
Non-recurring basis | Fair Value Measurement Using: Level 3 | Business loans: Commercial owner occupied
Quantitative information about level 3 of fair value measurements for financial instruments
Collateral dependent impaired loans	388
Non-recurring basis | Fair Value Measurement Using: Level 3 | Business loans: Commercial owner occupied | Collateral analysis
Unobservable Inputs
Rate (as a percent)	6.75%
Management adjustment to reflect current conditions and selling costs	7 years
Non-recurring basis | Fair Value Measurement Using: Level 3 | Business loans: Commercial owner occupied | Collateral analysis | Minimum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	0.00%
Non-recurring basis | Fair Value Measurement Using: Level 3 | Business loans: Commercial owner occupied | Collateral analysis | Maximum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	10.00%
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: Commercial non-owner occupied
Quantitative information about level 3 of fair value measurements for financial instruments
Collateral dependent impaired loans	479
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: Commercial non-owner occupied | Collateral analysis | Minimum
Unobservable Inputs
Rate (as a percent)	7.00%
Management adjustment to reflect current conditions and selling costs	2 years
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: Commercial non-owner occupied | Collateral analysis | Maximum
Unobservable Inputs
Rate (as a percent)	7.50%
Management adjustment to reflect current conditions and selling costs	12 years
Management adjustment to reflect current conditions and selling costs (as a percent)	15.00%
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: One-to-four family
Quantitative information about level 3 of fair value measurements for financial instruments
Collateral dependent impaired loans	54
Other real estate owned	285
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: One-to-four family | Collateral analysis | Minimum
Unobservable Inputs
Rate (as a percent)	8.00%
Management adjustment to reflect current conditions and selling costs	5 years
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: One-to-four family | Collateral analysis | Maximum
Unobservable Inputs
Rate (as a percent)	15.00%
Management adjustment to reflect current conditions and selling costs	15 years
Management adjustment to reflect current conditions and selling costs (as a percent)	10.00%
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: Land
Quantitative information about level 3 of fair value measurements for financial instruments
Other real estate owned	752
Non-recurring basis | Fair Value Measurement Using: Level 3 | Real estate loans: Land | Collateral analysis | Maximum
Unobservable Inputs
Management adjustment to reflect current conditions and selling costs (as a percent)	10.00%