ALLOWANCE FOR CREDIT LOSSES (Changes In The Allowance For Credit Losses By Segment And Class) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			$ 126,458	$ 142,443	$ 142,443
Charge-offs			(7,543)	(9,797)	(26,719)
Recoveries			5,020	15,666	23,734
Provision	$ 2,000	$ (5,000)	3,000	(10,000)	(13,000)
Balance at end of period	126,935	138,312	126,935	138,312	126,458
Commercial And Industrial [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			17,583	21,419	21,419
Charge-offs			(888)	(1,819)	(10,022)
Recoveries			551	784	2,035
Provision			473	1,094	4,151
Balance at end of period	17,719	21,478	17,719	21,478	17,583
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			33,198	40,015	40,015
Charge-offs			(1,187)	(1,467)	(3,995)
Recoveries			954	1,652	2,693
Provision			260	(1,895)	(5,515)
Balance at end of period	33,225	38,305	33,225	38,305	33,198
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			6,949	9,542	9,542
Charge-offs			(774)	(743)	(1,204)
Recoveries			326	426	639
Provision			666	408	(2,028)
Balance at end of period	7,167	9,633	7,167	9,633	6,949
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			2,524	3,420	3,420
Charge-offs			(21)	(8)	(33)
Recoveries			132	305	384
Provision			(272)	(678)	(1,247)
Balance at end of period	2,363	3,039	2,363	3,039	2,524
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			14,607	16,325	16,325
Charge-offs			(814)	(798)	(1,800)
Recoveries			226	696	2,834
Provision			(377)	1,121	(2,752)
Balance at end of period	13,642	17,344	13,642	17,344	14,607
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			15,925	9,885	9,885
Charge-offs			(506)	(615)	(1,039)
Recoveries			796	9,582	11,727
Provision			(679)	(9,061)	(4,648)
Balance at end of period	15,536	9,791	15,536	9,791	15,925
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			25,508	23,562	23,562
Charge-offs			(1,115)	(2,124)	(3,723)
Recoveries			1,192	1,320	1,656
Provision			2,103	(963)	4,013
Balance at end of period	27,688	21,795	27,688	21,795	25,508
Credit Cards [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			4,047	6,514	6,514
Charge-offs			(1,334)	(1,203)	(2,632)
Recoveries			380	336	658
Provision			346	(134)	(493)
Balance at end of period	3,439	5,513	3,439	5,513	4,047
All Other [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Balance at beginning of period			6,117	11,761	11,761
Charge-offs			(904)	(1,020)	(2,271)
Recoveries			463	565	1,108
Provision			480	108	(4,481)
Balance at end of period	$ 6,156	$ 11,414	$ 6,156	$ 11,414	$ 6,117