ALLOWANCE FOR CREDIT LOSSES (Allowance For Credit Losses By Segment, Class And Impairment Status) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	$ 28,101	$ 54,943
Allowance for impaired loans and leases	1,519	4,146
Allowance for all other loans and leases	140,924	149,090
Total allowance	142,443	153,236	164,466	195,118
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	2,154	1,314
Allowance for impaired loans and leases	215	305
Allowance for all other loans and leases	21,204	18,071
Total allowance	21,419	18,376	23,286
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	4,786	6,406
Allowance for impaired loans and leases	123	309
Allowance for all other loans and leases	39,892	39,216
Total allowance	40,015	39,525	35,966
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	619	1,140
Allowance for impaired loans and leases	70	37
Allowance for all other loans and leases	9,472	5,626
Total allowance	9,542	5,663	6,005
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans		882
Allowance for impaired loans and leases		15
Allowance for all other loans and leases	3,420	2,785
Total allowance	3,420	2,800	3,301
Real Estate [Member] | Commercial And Industrial-Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	7,467	11,745
Allowance for impaired loans and leases	89	739
Allowance for all other loans and leases	16,236	16,320
Total allowance	16,325	17,059	20,178
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	2,387	15,712
Allowance for impaired loans and leases		1,599
Allowance for all other loans and leases	9,885	10,229
Total allowance	9,885	11,828	21,905
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	10,518	17,481
Allowance for impaired loans and leases	1,022	1,138
Allowance for all other loans and leases	22,540	42,715
Total allowance	23,562	43,853	40,081
Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
Allowance for all other loans and leases	6,514	3,782
Total allowance	6,514	3,782	3,611
All Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	170	263
Allowance for impaired loans and leases		4
Allowance for all other loans and leases	11,761	10,346
Total allowance	$ 11,761	$ 10,350	$ 10,133