FAIR VALUE DISCLOSURES (Carrying And Fair Value Information) (Details) - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Assets [Abstract]
Available-for-sale securities	$ 2,161,125	$ 2,156,927	$ 2,211,462
Carrying Value [Member]
Assets [Abstract]
Cash and due from banks	159,923	204,231
Interest bearing deposits with other banks	113,068	153,019
Available-for-sale securities	2,161,125	2,156,927
Net loans and leases	10,086,567	9,570,493
Loans held for sale	170,175	141,015
Liabilities [Abstract]
Noninterest bearing deposits	3,053,439	2,778,686
Savings and interest bearing deposits	6,204,512	6,200,017
Other time deposits	1,883,995	1,993,636
Federal funds purchased and securities sold under agreement to repurchase and other short-term borrowings	649,703	391,666
Long-term debt and other borrowings	95,079	101,372
Derivative instruments [Abstract]
Forward commitments to sell fixed rate mortgage loans	(2,072)	(1,163)
Commitments to fund fixed rate mortgage loans	4,901	2,137
Interest rate swap position to receive	19,297	21,653
Interest rate swap position to pay	(19,596)	(22,004)
Fair Value [Member]
Assets [Abstract]
Cash and due from banks	159,923	204,231
Interest bearing deposits with other banks	113,068	153,019
Available-for-sale securities	2,161,125	2,156,927
Net loans and leases	10,207,723	10,066,945
Loans held for sale	170,175	141,015
Liabilities [Abstract]
Noninterest bearing deposits	3,053,439	2,778,686
Savings and interest bearing deposits	6,204,512	6,200,017
Other time deposits	1,897,196	2,005,023
Federal funds purchased and securities sold under agreement to repurchase and other short-term borrowings	649,707	391,743
Long-term debt and other borrowings	101,026	106,218
Derivative instruments [Abstract]
Forward commitments to sell fixed rate mortgage loans	(2,072)	(1,163)
Commitments to fund fixed rate mortgage loans	4,901	2,137
Interest rate swap position to receive	19,297	21,653
Interest rate swap position to pay	$ (19,596)	$ (22,004)