LOANS AND LEASES (Aging Of Loan And Lease Portfolio, Net Of Unearned Income, By Segment And Class) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	$ 30,730	$ 29,315
60-89 Days Past Due	8,941	11,524
90 Plus Days Past Due	38,437	51,345
Total Past Due	78,108	92,184
Current	8,695,007	8,544,805
Total	8,773,115	8,636,989
90 Plus Days Past Due still Accruing	1,479	1,210	1,442
Commercial and industrial segment [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	1,553	3,531
60-89 Days Past Due	580	476
90 Plus Days Past Due	1,595	4,118
Total Past Due	3,728	8,125
Current	1,500,081	1,468,486
Total	1,503,809	1,476,611
90 Plus Days Past Due still Accruing	15	414
Real estate segment [Member] | Consumer mortgages [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	11,488	11,308
60-89 Days Past Due	2,928	3,643
90 Plus Days Past Due	13,004	13,821
Total Past Due	27,420	28,772
Current	1,903,751	1,845,103
Total	1,931,171	1,873,875
90 Plus Days Past Due still Accruing	1,178	512
Real estate segment [Member] | Home equity [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	1,095	1,337
60-89 Days Past Due	280	371
90 Plus Days Past Due	569	350
Total Past Due	1,944	2,058
Current	488,417	484,016
Total	490,361	486,074
Real estate segment [Member] | Agricultural [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	740	400
60-89 Days Past Due	22	287
90 Plus Days Past Due	3,145	3,946
Total Past Due	3,907	4,633
Current	230,640	251,563
Total	234,547	256,196
90 Plus Days Past Due still Accruing		10
Real estate segment [Member] | Commercial and industrial-owner occupied [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	1,355	2,629
60-89 Days Past Due	3,619	3,587
90 Plus Days Past Due	1,440	2,933
Total Past Due	6,414	9,149
Current	1,415,663	1,323,954
Total	1,422,077	1,333,103
90 Plus Days Past Due still Accruing		19
Real estate segment [Member] | Construction, acquisition and development [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	4,525	2,547
60-89 Days Past Due	247	2,472
90 Plus Days Past Due	9,210	14,790
Total Past Due	13,982	19,809
Current	709,627	715,999
Total	723,609	735,808
Real estate segment [Member] | Commercial real estate [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	7,912	4,673
60-89 Days Past Due	752	56
90 Plus Days Past Due	8,733	10,469
Total Past Due	17,397	15,198
Current	1,777,955	1,733,683
Total	1,795,352	1,748,881
Credit cards segment [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	462	536
60-89 Days Past Due	290	379
90 Plus Days Past Due	286	473
Total Past Due	1,038	1,388
Current	104,074	103,496
Total	105,112	104,884
90 Plus Days Past Due still Accruing	263	228
All other [Member]
Aging of loan and lease portfolio [Abstract]
30-59 Days Past Due	1,600	2,354
60-89 Days Past Due	223	253
90 Plus Days Past Due	455	445
Total Past Due	2,278	3,052
Current	564,799	618,505
Total	567,077	621,557
90 Plus Days Past Due still Accruing	$ 23	$ 27