LOANS AND LEASES (Loan And Lease Portfolio, Net Of Unearned Income, By Segment, Class And Internally Assigned Grade) (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Total	$ 10,801,694	$ 10,811,991	$ 10,444,697
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,527,923
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,180
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	227,195
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	499
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	41,897
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,536,527	1,612,295
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,489,753	1,562,263
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	34,936	41,618
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		100
Commercial And Industrial [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,838	8,314
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,675,672	2,643,966
Real Estate [Member] | Consumer Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,611,576	2,579,905
Real Estate [Member] | Consumer Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	517	522
Real Estate [Member] | Consumer Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	62,045	61,602
Real Estate [Member] | Consumer Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	258	282
Real Estate [Member] | Consumer Mortgages [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,276	1,655
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	626,488	628,846
Real Estate [Member] | Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	615,753	616,758
Real Estate [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	9,881	11,231
Real Estate [Member] | Home Equity [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	854	857
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	240,534	245,377
Real Estate [Member] | Agricultural [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	227,902	233,939
Real Estate [Member] | Agricultural [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	8,899	10,577
Real Estate [Member] | Agricultural [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	141
Real Estate [Member] | Agricultural [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,592	861
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,801,613	1,764,265
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,734,995	1,705,266
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,663	3,668
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	50,908	47,010
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	12,047	8,321
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,136,827	1,157,248
Real Estate [Member] | Construction, Acquisition And Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,124,929	1,135,618
Real Estate [Member] | Construction, Acquisition And Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	11,621	15,697
Real Estate [Member] | Construction, Acquisition And Development [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	277	5,933
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,271,542	2,237,719
Real Estate [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,216,915	2,179,318
Real Estate [Member] | Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		634
Real Estate [Member] | Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	42,614	45,471
Real Estate [Member] | Commercial Real Estate [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	12,013	12,296
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	103,813	109,656
Credit Cards [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	103,813	109,656
All Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	408,678	412,619
All Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	402,287	405,611
All Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,291	$ 7,008
All Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 100