Fair Value (Details 3) (Significant Unobservable Inputs (Level 3), USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Fair value quantitative information
Fair Value	$ 281,830	$ 248,167
Fair Value, Measurements, Nonrecurring | Impaired loans | Single family
Fair value quantitative information
Fair Value	577	1,245
Fair Value, Measurements, Nonrecurring | Impaired loans | Multi-family
Fair value quantitative information
Fair Value	331	900
Fair Value, Measurements, Nonrecurring | Impaired loans | Commercial real estate
Fair value quantitative information
Fair Value	1,210	1,391
Fair Value, Measurements, Nonrecurring | Impaired loans | Church
Fair value quantitative information
Fair Value	4,121	9,024
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Single family | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(9.00%)	(6.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Single family | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(1.00%)	6.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Single family | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(4.00%)	(1.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Multi-family
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(18.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Multi-family | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		(15.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Multi-family | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		1.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Multi-family | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		(9.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Commercial real estate | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	0.00%	(1.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Commercial real estate | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	1.00%	0.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Commercial real estate | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	0.00%	(1.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Church | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(12.00%)	(21.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Church | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	18.00%	9.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Sales comparison approach | Church | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	6.00%	(1.00%)
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Multi-family
Fair value quantitative information
Capitalization rate (as a percent)	7.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Multi-family | Minimum
Fair value quantitative information
Capitalization rate (as a percent)		8.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Multi-family | Maximum
Fair value quantitative information
Capitalization rate (as a percent)		9.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Multi-family | Weighted Average
Fair value quantitative information
Capitalization rate (as a percent)		8.59%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Commercial real estate | Minimum
Fair value quantitative information
Capitalization rate (as a percent)	5.00%	4.50%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Commercial real estate | Maximum
Fair value quantitative information
Capitalization rate (as a percent)	7.25%	8.00%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Commercial real estate | Weighted Average
Fair value quantitative information
Capitalization rate (as a percent)	6.63%	7.06%
Fair Value, Measurements, Nonrecurring | Impaired loans | Income approach | Church
Fair value quantitative information
Capitalization rate (as a percent)	7.00%	6.75%
Fair Value, Measurements, Nonrecurring | Real estate owned | Commercial real estate
Fair value quantitative information
Fair Value		151
Fair Value, Measurements, Nonrecurring | Real estate owned | Church
Fair value quantitative information
Fair Value	$ 2,500	$ 1,933
Fair Value, Measurements, Nonrecurring | Real estate owned | Sales comparison approach | Commercial real estate
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		3.00%
Fair Value, Measurements, Nonrecurring | Real estate owned | Sales comparison approach | Commercial real estate | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)		3.00%
Fair Value, Measurements, Nonrecurring | Real estate owned | Sales comparison approach | Church | Minimum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	(2.00%)	(7.00%)
Fair Value, Measurements, Nonrecurring | Real estate owned | Sales comparison approach | Church | Maximum
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	2.00%	7.00%
Fair Value, Measurements, Nonrecurring | Real estate owned | Sales comparison approach | Church | Weighted Average
Fair value quantitative information
Adjustment for differences between the comparable sales (as a percent)	0.00%	0.00%
Fair Value, Measurements, Nonrecurring | Real estate owned | Income approach | Commercial real estate
Fair value quantitative information
Capitalization rate (as a percent)		10.00%