ALLOWANCE FOR CREDIT LOSSES (Changes In The Allowance For Credit Losses By Segment And Class) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		$ 153,236	$ 164,466	$ 164,466
Charge-offs		(20,175)	(33,864)	(42,192)
Recoveries		10,889	15,872	23,462
Provision	500		7,500	7,500
Balance at end of period	153,974	143,950	153,974	153,236
Commercial And Industrial [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		18,376	23,286	23,286
Charge-offs		(1,367)	(3,835)	(4,672)
Recoveries		2,000	2,156	3,517
Provision		2,319	(2,275)	(3,755)
Balance at end of period	19,332	21,328	19,332	18,376
Real Estate [Member] | Consumer Mortgages [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		39,525	35,966	35,966
Charge-offs		(5,137)	(7,724)	(9,159)
Recoveries		2,446	3,332	5,067
Provision		4,594	4,793	7,651
Balance at end of period	36,367	41,428	36,367	39,525
Real Estate [Member] | Home Equity [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		5,663	6,005	6,005
Charge-offs		(1,266)	(1,182)	(1,469)
Recoveries		523	510	607
Provision		4,720	327	520
Balance at end of period	5,660	9,640	5,660	5,663
Real Estate [Member] | Agricultural [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		2,800	3,301	3,301
Charge-offs		(761)	(498)	(736)
Recoveries		80	181	215
Provision		1,579	(182)	20
Balance at end of period	2,802	3,698	2,802	2,800
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		17,059	20,178	20,178
Charge-offs		(3,371)	(2,814)	(3,855)
Recoveries		896	1,990	2,724
Provision		2,673	(1,640)	(1,988)
Balance at end of period	17,714	17,257	17,714	17,059
Real Estate [Member] | Construction, Acquisition And Development [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		11,828	21,905	21,905
Charge-offs		(3,165)	(4,961)	(6,745)
Recoveries		2,837	2,199	4,682
Provision		(1,326)	(6,218)	(8,014)
Balance at end of period	12,925	10,174	12,925	11,828
Real Estate [Member] | Commercial Real Estate [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		43,853	40,081	40,081
Charge-offs		(1,332)	(9,302)	(10,341)
Recoveries		835	4,194	4,978
Provision		(20,155)	9,815	9,135
Balance at end of period	44,788	23,201	44,788	43,853
Credit Cards [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		3,782	3,611	3,611
Charge-offs		(1,779)	(1,757)	(2,316)
Recoveries		382	496	629
Provision		3,470	1,232	1,858
Balance at end of period	3,582	5,855	3,582	3,782
All Other [Member]
Changes in the allowance for credit losses [Roll Forward]
Balance at beginning of period		10,350	10,133	10,133
Charge-offs		(1,997)	(1,791)	(2,899)
Recoveries		890	814	1,043
Provision		2,126	1,648	2,073
Balance at end of period	$ 10,804	$ 11,369	$ 10,804	$ 10,350