LOANS AND LEASES (Loan And Lease Portfolio, Net Of Unearned Income, By Segment, Class And Internally Assigned Grade) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016
Financing Receivable, Recorded Investment [Line Items]
Total	$ 11,018,540	$ 10,811,991	$ 10,575,978
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,740,172
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	17,571
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	231,554
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	985
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	28,258
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,566,459	1,612,295
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,516,992	1,562,263
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	41,604	41,618
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	301	100
Commercial And Industrial [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	7,562	8,314
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,776,213	2,643,966
Real Estate [Member] | Consumer Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,710,161	2,579,905
Real Estate [Member] | Consumer Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		522
Real Estate [Member] | Consumer Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	63,352	61,602
Real Estate [Member] | Consumer Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	276	282
Real Estate [Member] | Consumer Mortgages [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,424	1,655
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	624,868	628,846
Real Estate [Member] | Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	613,216	616,758
Real Estate [Member] | Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	10,802	11,231
Real Estate [Member] | Home Equity [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	850	857
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	245,646	245,377
Real Estate [Member] | Agricultural [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	225,504	233,939
Real Estate [Member] | Agricultural [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	8,157
Real Estate [Member] | Agricultural [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,740	10,577
Real Estate [Member] | Agricultural [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	5,245	861
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,795,321	1,764,265
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,734,306	1,705,266
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	3,161	3,668
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	50,644	47,010
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	7,210	8,321
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,156,901	1,157,248
Real Estate [Member] | Construction, Acquisition And Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,136,104	1,135,618
Real Estate [Member] | Construction, Acquisition And Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,253
Real Estate [Member] | Construction, Acquisition And Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	14,298	15,697
Real Estate [Member] | Construction, Acquisition And Development [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	246	5,933
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,341,633	2,237,719
Real Estate [Member] | Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,299,529	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	37,214	45,471
Real Estate [Member] | Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	169
Real Estate [Member] | Commercial Real Estate [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	4,721	12,296
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	104,169	109,656
Credit Cards [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	104,169	109,656
All Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	407,330	412,619
All Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	400,191	405,611
All Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	6,900	$ 7,008
All Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 239