LOANS AND LEASES (Loan And Lease Portfolio, Net Of Unearned Income, By Segment, Class And Internally Assigned Grade) (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Financing Receivable, Recorded Investment [Line Items]
Total	$ 10,444,697	$ 10,372,778	$ 9,726,970
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 10,153,249	$ 10,093,619
Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 240,897	$ 227,141
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 905	$ 626
Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 49,646	$ 51,392
Commercial And Industrial [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,716,477	1,747,774
Commercial And Industrial [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,672,249	$ 1,721,118
Commercial And Industrial [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial And Industrial [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 35,633	$ 19,529
Commercial And Industrial [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 394
Commercial And Industrial [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial And Industrial [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 8,201	$ 7,127
Consumer Mortgages [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	2,480,828	2,472,202
Consumer Mortgages [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,407,869	$ 2,399,081
Consumer Mortgages [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Consumer Mortgages [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 69,215	$ 68,768
Consumer Mortgages [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 11	$ 363
Consumer Mortgages [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Consumer Mortgages [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 3,733	$ 3,990
Home Equity [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	605,228	589,752
Home Equity [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 593,500	$ 577,539
Home Equity [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Home Equity [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 9,938	$ 10,418
Home Equity [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Home Equity [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,790	$ 1,795
Agricultural [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	239,422	259,360
Agricultural [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 229,935	$ 250,579
Agricultural [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Agricultural [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 8,632	$ 7,909
Agricultural [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Agricultural [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 855	$ 872
Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	1,654,577	1,617,429
Commercial And Industrial - Owner Occupied [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 1,595,424	$ 1,554,984
Commercial And Industrial - Owner Occupied [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial And Industrial - Owner Occupied [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 47,293	$ 50,304
Commercial And Industrial - Owner Occupied [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial And Industrial - Owner Occupied [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 11,860	$ 12,141
Construction, Acquisition And Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	966,362	945,045
Construction, Acquisition And Development [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 944,533	$ 920,372
Construction, Acquisition And Development [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Construction, Acquisition And Development [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 15,908	$ 17,090
Construction, Acquisition And Development [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Construction, Acquisition And Development [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 5,921	$ 7,583
Credit Cards [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	106,714	112,165
Credit Cards [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 106,714	$ 112,165
Credit Cards [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Credit Cards [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,233,742	$ 2,188,048
Commercial Real Estate [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 2,166,616	$ 2,124,448
Commercial Real Estate [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial Real Estate [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 49,440	$ 45,658
Commercial Real Estate [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 400	$ 161
Commercial Real Estate [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
Commercial Real Estate [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 17,286	$ 17,781
All Other [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	441,347	441,003
All Other [Member] | Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 436,409	$ 433,333
All Other [Member] | Special Mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
All Other [Member] | Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 4,838	$ 7,465
All Other [Member] | Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Total	$ 100	$ 102
All Other [Member] | Loss [Member]
Financing Receivable, Recorded Investment [Line Items]
Total
All Other [Member] | Impaired [Member]
Financing Receivable, Recorded Investment [Line Items]
Total		$ 103