ALLOWANCE FOR CREDIT LOSSES (Changes In The Allowance For Credit Losses By Segment And Class) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision	$ 500	$ 2,500	$ 3,000
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		19,170	17,583	$ 17,583
Charge-offs		(6,120)	(2,068)	(4,551)
Recoveries		2,005	814	1,833
Provision		2,749	1,516	4,305
Balance at end of period	17,804	17,804	17,845	19,170
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		30,386	33,198	33,198
Charge-offs		(2,311)	(1,782)	(2,687)
Recoveries		1,606	1,281	1,694
Provision		1,024	(1,078)	(1,819)
Balance at end of period	30,705	30,705	31,619	30,386
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		7,174	6,949	6,949
Charge-offs		(1,023)	(1,011)	(1,884)
Recoveries		844	435	506
Provision		(1,162)	1,674	1,603
Balance at end of period	5,833	5,833	8,047	7,174
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		2,172	2,524	2,524
Charge-offs		(104)	(110)	(110)
Recoveries		152	160	175
Provision		(93)	(422)	(417)
Balance at end of period	2,127	2,127	2,152	2,172
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		12,899	14,607	14,607
Charge-offs		(1,884)	(1,075)	(1,095)
Recoveries		959	343	544
Provision		2,889	(1,090)	(1,157)
Balance at end of period	14,863	14,863	12,785	12,899
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		13,957	15,925	15,925
Charge-offs		(113)	(511)	(521)
Recoveries		1,792	1,178	1,373
Provision		(2,181)	(3,015)	(2,820)
Balance at end of period	13,455	13,455	13,577	13,957
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		24,845	25,508	25,508
Charge-offs		(69)	(1,129)	(1,129)
Recoveries		295	2,235	2,411
Provision		(3,480)	233	(1,945)
Balance at end of period	21,591	21,591	26,847	24,845
Credit Cards [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		7,787	4,047	4,047
Charge-offs		(2,364)	(2,030)	(2,845)
Recoveries		631	642	850
Provision		1,171	4,459	5,735
Balance at end of period	7,225	7,225	7,118	7,787
All Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period		5,346	6,117	6,117
Charge-offs		(1,861)	(1,617)	(2,197)
Recoveries		825	674	911
Provision		1,583	723	515
Balance at end of period	$ 5,893	$ 5,893	$ 5,897	$ 5,346