Loans Receivable and Allowance for Loan Losses (Details 5) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financing Receivable, Recorded Investment, Past Due
Total Past Due	$ 2,759	$ 2,542
Loans Not Past Due	1,110,058	967,361
Total ending loan balance	1,112,817	969,903
Nonaccrual Loans	5,211	4,453
One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due	2,710	2,369
Loans Not Past Due	1,062,504	919,624
Total ending loan balance	1,065,214	921,993
Nonaccrual Loans	5,082	4,153
Multi-family residential
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	9,814	8,897
Total ending loan balance	9,814	8,897
Construction, Commercial and Other Mortgage Loans
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	17,086	18,399
Total ending loan balance	17,086	18,399
Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
Total Past Due	43	161
Loans Not Past Due	16,163	15,837
Total ending loan balance	16,206	15,998
Nonaccrual Loans	129	296
Loans on deposit accounts
Financing Receivable, Recorded Investment, Past Due
Loans Not Past Due	269	440
Total ending loan balance	269	440
Consumer and other loans
Financing Receivable, Recorded Investment, Past Due
Total Past Due	6	12
Loans Not Past Due	4,222	4,164
Total ending loan balance	4,228	4,176
Nonaccrual Loans		4
30 - 59 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	667	1,047
30 - 59 Days Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due	618	1,040
30 - 59 Days Past Due | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
Total Past Due	43
30 - 59 Days Past Due | Consumer and other loans
Financing Receivable, Recorded Investment, Past Due
Total Past Due	6	7
60 - 89 Days Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	287	737
60 - 89 Days Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due	287	736
60 - 89 Days Past Due | Consumer and other loans
Financing Receivable, Recorded Investment, Past Due
Total Past Due		1
90 Days or Greater Past Due
Financing Receivable, Recorded Investment, Past Due
Total Past Due	1,805	758
90 Days or Greater Past Due | One- to four-family residential
Financing Receivable, Recorded Investment, Past Due
Total Past Due	$ 1,805	593
90 Days or Greater Past Due | Home Equity Loans and Lines of Credit
Financing Receivable, Recorded Investment, Past Due
Total Past Due		161
90 Days or Greater Past Due | Consumer and other loans
Financing Receivable, Recorded Investment, Past Due
Total Past Due		$ 4