DERIVATIVES AND HEDGING (Derivatives Not Designated as Hedging, by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2015	Dec. 31, 2014
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		$ 9,647	$ 6,290
Liability Derivatives, Fair Value		9,647	6,290
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		9,647	6,290
Liability Derivatives, Fair Value		9,647	6,290
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		229,477	163,823
Liability Derivatives, Notional/Contract Amount		228,528	167,686
Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	9,436	5,442
Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	9,052	5,323
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		159,826	134,512
Liability Derivatives, Notional/Contract Amount		159,826	134,512
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	8,557	5,125
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Loans Receivable [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		421	558
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	8,557	5,125
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		41,449	29,311
Liability Derivatives, Notional/Contract Amount		28,202	0
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	753	317
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	126	0
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		28,202	0
Liability Derivatives, Notional/Contract Amount		40,500	33,174
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	126	0
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	$ 369	$ 198

[1] Included in Other assets on the Consolidated Statements of Financial Condition, with the exception of those interest rate swaps from prior to 2009 that were not designated in hedge relationships (with a fair value of $421,000 at September 30, 2015 and $558,000 at December 31, 2014), which are included in Loans receivable.

[2] Included in Other liabilities on the Consolidated Statements of Financial Condition.