Loans Receivable and Allowance for Loan Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Real estate loans:
Total real estate loans	$ 1,112,412		$ 969,401
Other loans:
Total other loans	4,483		4,614
Less: Net unearned fees and discounts	(4,078)		(4,112)
Less: Allowance for loan losses	(1,994)	$ (1,872)	(1,691)	$ (1,510)	$ (1,485)	$ (1,486)
Total unearned fees, discounts and allowance for loan losses	(6,072)		(5,803)
Loans receivable, net	1,110,823		968,212
One- to four-family residential
Real estate loans:
Total real estate loans	1,069,243		926,074
Multi-family residential
Real estate loans:
Total real estate loans	9,840		8,920
Construction, Commercial and Other Mortgage Loans
Real estate loans:
Total real estate loans	17,129		18,415
Other loans:
Less: Allowance for loan losses	(407)	(543)	(977)	(932)	(823)	(799)
Home Equity Loans and Lines of Credit
Real estate loans:
Total real estate loans	16,200		15,992
Other loans:
Less: Allowance for loan losses	(3)	$ (4)	(5)	$ (7)	$ (7)	$ (10)
Loans on deposit accounts
Other loans:
Total other loans	269		441
Consumer and other loans
Other loans:
Total other loans	$ 4,214		$ 4,173