COMMITMENTS AND CONTINGENCIES (Commitments Without Recorded Liability) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Reserve for Unfunded Loan Commitments	$ 2,600,000
Mortgage loan applications, day interest rate is locked	45 days
Minimum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Mortgage loan applications, day interest rate is locked	30 days
Maximum [Member]
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Mortgage loan applications, day interest rate is locked	60 days
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	$ 2,928,126,000		$ 2,837,981,000
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	15,725,000		17,784,000
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	50,310,000		32,145,000
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	41,039,000		24,091,000
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	120,488,000		31,728,000
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	94,884,000		18,328,000
Counterparty default losses on forward contracts	0	$ 0
ERROR in label resolution.
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]
Contract or Notional Amount	277,750,000		$ 144,250,000
Counterparty default losses on forward contracts	$ 0	$ 0