Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Valuation methodologies used for assets measured at fair value
Impaired loans comprising residential mortgage loans (as a percent)	73.00%	81.00%
Impaired loans comprising multi-family and commercial real estate loans (as a percent)	25.00%	19.00%
Percentage of Impaired Loans Comprising home equity lines of credit	2.00%
Impaired loans for which fair value adjustment is recognized comprising residential mortgage loans (as a percent)	66.00%	83.00%
Impaired loans for which fair value adjustment is recognized comprising multi-family and commercial real estate loans (as a percent)	33.00%	17.00%
Impaired loans for which fair value adjustment is recognized comprising home equity lines of credit (as a percent)	1.00%
Real estate owned, net	$ 42,458	$ 42,636
Weighted average
Valuation methodologies used for assets measured at fair value
Assumption to estimate fair value of servicing asset, weighted average discount rate (as a percent)	9.48%	9.45%
Assumption to estimate fair value of servicing asset, weighted average constant prepayment rate (as a percent)	11.77%	10.52%
Assumption to estimate fair value of servicing asset, weighted average life	5 years 10 months 24 days	6 years 3 months 18 days
Residential Mortgage Loans
Valuation methodologies used for assets measured at fair value
Period after which loans are individually evaluated for impairment	180 days
Period past due when loan servicer performs property inspections	45 days
Real estate owned, net	$ 40,400