FEDERAL HOME LOAN BANK (FHLB) ADVANCES (Details 4) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
First lien, single family residential real estate
Real estate loans pledged to collateralize advances and letters of credit with the FHLB
Real estate loans pledged to collateralize advances and letters of credit with FHLB	$ 1,342,005	$ 1,333,811
Home equity lines of credit
Real estate loans pledged to collateralize advances and letters of credit with the FHLB
Real estate loans pledged to collateralize advances and letters of credit with FHLB	262,747	103,064
Multi-family commercial real estate
Real estate loans pledged to collateralize advances and letters of credit with the FHLB
Real estate loans pledged to collateralize advances and letters of credit with FHLB	$ 18,068	$ 12,682