ALLOWANCE FOR CREDIT LOSSES (Allowance For Credit Losses By Segment, Class And Impairment Status) (Details) - USD ($)	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Dec. 31, 2013
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	$ 35,113,000	$ 28,101,000
Allowance for impaired loans and leases	3,942,000	1,519,000
Allowance for all other loans and leases	134,370,000	140,924,000
Total allowance	138,312,000	142,443,000	$ 147,132,000	$ 153,236,000
Evaluated for impairment threshold	500,000
Commercial And Industrial [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	7,167,000	2,154,000
Allowance for impaired loans and leases	1,925,000	215,000
Allowance for all other loans and leases	19,553,000	21,204,000
Total allowance	21,478,000	21,419,000	19,598,000	18,376,000
Real Estate [Member] | Consumer Mortgages [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	3,604,000	4,786,000
Allowance for impaired loans and leases		123,000
Allowance for all other loans and leases	38,305,000	39,892,000
Total allowance	38,305,000	40,015,000	36,470,000	39,525,000
Real Estate [Member] | Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	1,811,000	619,000
Allowance for impaired loans and leases	69,000	70,000
Allowance for all other loans and leases	9,564,000	9,472,000
Total allowance	9,633,000	9,542,000	5,420,000	5,663,000
Real Estate [Member] | Agricultural [Member]
Financing Receivable, Impaired [Line Items]
Allowance for all other loans and leases	3,039,000	3,420,000
Total allowance	3,039,000	3,420,000	2,476,000	2,800,000
Real Estate [Member] | Commercial And Industrial - Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	9,584,000	7,467,000
Allowance for impaired loans and leases	1,699,000	89,000
Allowance for all other loans and leases	15,645,000	16,236,000
Total allowance	17,344,000	16,325,000	17,627,000	17,059,000
Real Estate [Member] | Construction, Acquisition And Development [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	3,615,000	2,387,000
Allowance for all other loans and leases	9,791,000	9,885,000
Total allowance	9,791,000	9,885,000	10,409,000	11,828,000
Real Estate [Member] | Commercial Real Estate [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	9,033,000	10,518,000
Allowance for impaired loans and leases	249,000	1,022,000
Allowance for all other loans and leases	21,546,000	22,540,000
Total allowance	21,795,000	23,562,000	43,298,000	43,853,000
Credit Cards [Member]
Financing Receivable, Impaired [Line Items]
Allowance for all other loans and leases	5,513,000	6,514,000
Total allowance	5,513,000	6,514,000	2,550,000	3,782,000
All Other [Member]
Financing Receivable, Impaired [Line Items]
Recorded balance of impaired loans	299,000	170,000
Allowance for all other loans and leases	11,414,000	11,761,000
Total allowance	$ 11,414,000	$ 11,761,000	$ 9,284,000	$ 10,350,000