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, 2015	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		$ 142,443	$ 153,236	$ 153,236
Charge-offs			(13,690)	(25,027)
Recoveries			7,586	14,234
Provision	$ (5,000)	(10,000)
Balance at end of period	138,312	138,312	147,132	142,443
Commercial And Industrial [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		21,419	18,376	18,376
Charge-offs		(1,819)	(1,061)	(2,546)
Recoveries		784	1,435	2,298
Provision		1,094	848	3,291
Balance at end of period	21,478	21,478	19,598	21,419
Real Estate [Member] | Consumer Mortgages [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		40,015	39,525	39,525
Charge-offs		(1,467)	(3,627)	(6,037)
Recoveries		1,652	1,494	3,267
Provision		(1,895)	(922)	3,260
Balance at end of period	38,305	38,305	36,470	40,015
Real Estate [Member] | Home Equity [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		9,542	5,663	5,663
Charge-offs		(743)	(756)	(1,359)
Recoveries		426	366	625
Provision		408	147	4,613
Balance at end of period	9,633	9,633	5,420	9,542
Real Estate [Member] | Agricultural [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		3,420	2,800	2,800
Charge-offs		(8)	(714)	(765)
Recoveries		305	35	96
Provision		(678)	355	1,289
Balance at end of period	3,039	3,039	2,476	3,420
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		16,325	17,059	17,059
Charge-offs		(798)	(2,142)	(3,591)
Recoveries		696	436	1,112
Provision		1,121	2,274	1,745
Balance at end of period	17,344	17,344	17,627	16,325
Real Estate [Member] | Construction, Acquisition And Development [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		9,885	11,828	11,828
Charge-offs		(615)	(1,707)	(3,731)
Recoveries		9,582	2,445	3,734
Provision		(9,061)	(2,157)	(1,946)
Balance at end of period	9,791	9,791	10,409	9,885
Real Estate [Member] | Commercial Real Estate [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		23,562	43,853	43,853
Charge-offs		(2,124)	(1,262)	(1,795)
Recoveries		1,320	549	1,458
Provision		(963)	158	(19,954)
Balance at end of period	21,795	21,795	43,298	23,562
Credit Cards [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		6,514	3,782	3,782
Charge-offs		(1,203)	(1,167)	(2,359)
Recoveries		336	266	542
Provision		(134)	(331)	4,549
Balance at end of period	5,513	5,513	2,550	6,514
All Other [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		11,761	10,350	10,350
Charge-offs		(1,020)	(1,254)	(2,844)
Recoveries		565	560	1,102
Provision		108	(372)	3,153
Balance at end of period	$ 11,414	$ 11,414	$ 9,284	$ 11,761