DERIVATIVES AND HEDGING (Derivatives Not Designated as Hedging, by Balance Sheet Location) (Details) - USD ($) $ in Thousands		Sep. 30, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		$ 18,999	$ 11,984
Liability Derivatives, Fair Value		18,999	11,984
Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		18,999	11,984
Liability Derivatives, Fair Value		18,999	11,984
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		407,837	411,583
Liability Derivatives, Notional/Contract Amount		399,978	326,700
Not Designated as Hedging Instrument [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	19,250	11,517
Not Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	18,671	11,096
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		301,818	293,937
Liability Derivatives, Notional/Contract Amount		301,818	293,937
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	18,131	11,046
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Loans Receivable [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value		1,100	327
Not Designated as Hedging Instrument [Member] | Interest rate swaps [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	18,131	11,046
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		67,713	76,146
Liability Derivatives, Notional/Contract Amount		38,306	0
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	894	428
Not Designated as Hedging Instrument [Member] | Mortgage loan commitments [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	225	0
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Notional/Contract Amount		38,306	41,500
Liability Derivatives, Notional/Contract Amount		59,854	32,763
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other assets [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives, Fair Value	[1]	225	43
Not Designated as Hedging Instrument [Member] | Forward sales contracts [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Liability Derivatives, Fair Value	[2]	$ 315	$ 50

[1] Included in Other assets on the Consolidated Statements of Financial Condition, with the exception of those interest rate swaps that were not designated in hedge relationships (with a fair value of $1.1 million at September 30, 2016 and $327,000 at December 31, 2015), which are included in Loans receivable.

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