INTEREST-BEARING DEPOSITS AND SECURITIES (Schedule of Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Open Option Contracts Written [Line Items]
Interest-bearing deposits	$ 98,376	$ 54,995
Securities	552,477	582,537
Interest-bearing deposits and securities	650,853	637,532
U.S. Government and agency obligations [Member]
Open Option Contracts Written [Line Items]
Securities	14,374	33,421
Total municipal bonds [Member]
Open Option Contracts Written [Line Items]
Securities	182,277	171,419
Taxable municipal bonds [Member]
Open Option Contracts Written [Line Items]
Securities	29,172	29,566
Tax exempt municipal bonds [Member]
Open Option Contracts Written [Line Items]
Securities	153,105	141,853
Corporate bonds [Member]
Open Option Contracts Written [Line Items]
Securities	19,406	25,936
Total mortgage-backed or related securities [Member]
Open Option Contracts Written [Line Items]
Securities	305,108	326,307
1-4 residential agency guaranteed [Member]
Open Option Contracts Written [Line Items]
Securities	64,731	58,825
1-4 residential other [Member]
Open Option Contracts Written [Line Items]
Securities	548	713
Multifamily agency guaranteed [Member]
Open Option Contracts Written [Line Items]
Securities	229,278	256,272
Multifamily other [Member]
Open Option Contracts Written [Line Items]
Securities	10,551	10,497
Asset-backed Securities [Member]
Open Option Contracts Written [Line Items]
Securities	31,252	25,395
Student Loan Marketing Association (SLMA) [Member]
Open Option Contracts Written [Line Items]
Securities	15,533	15,629
Other asset-backed securities [Member]
Open Option Contracts Written [Line Items]
Securities	15,719	9,766
Equity securities (excludes FHLB stock) [Member]
Open Option Contracts Written [Line Items]
Securities	$ 60	$ 59