GOODWILL, OTHER INTANGIBLE ASSETS AND MORTGAGE SERVICING RIGHTS (Mortgage Servicing Rights) (Details) - Mortgage Servicing Rights [Member] - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Morgage Servicing Rights at Amortized Value [Line Items]
Loans Serviced For Others		$ 2,090,000		$ 2,050,000
Custodial Accounts		8,000		$ 10,300
Servicing Asset at Amortized Value, Balance [Roll Forward]
Balance, net of valuation allowance, beginning of the period		15,249	$ 13,295
Additions—amounts capitalized		945	1,204
Amortization	[1]	(922)	(823)
Balance, net of valuation allowance, end of the period	[2]	15,272	$ 13,676
Valuation allowance, end of period	[2]	$ 0

[1] Amortization of mortgage servicing rights is recorded as a reduction of loan servicing income and any unamortized balance is fully amortized if the loan repays in full.

[2] There was no valuation allowance as of March 31, 2017 and 2016.