FAIR VALUE DISCLOSURES (Changes in Level Three Assets and Liabilities Measured at Fair Value on a Recurring Basis) (Details) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Mortgage Servicing Rights [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	$ 57,268	$ 51,296
Net income	(6,711)	(8,167)
Other comprehensive income
Purchases, sales, issuances and settlements, net	(14,706)	14,139
Transfers in and/or out of Level 3
Ending Balance	65,263	57,268
Net unrealized (losses) gains included in net income for the year relating to assets and liabilities held	1,526	(1,161)
Derivative Instruments [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning Balance	3,257	623
Net income	2,881	2,634
Other comprehensive income
Purchases, sales, issuances and settlements, net
Transfers in and/or out of Level 3
Ending Balance	6,138	3,257
Net unrealized (losses) gains included in net income for the year relating to assets and liabilities held	$ 2,881	$ 2,634