Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Summary of Aging of the Loan Portfolio by Class) (Details) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 13,106 $ 29,297  
60-89 Days Past Due 9,270 8,730  
Greater Than 90 Days and still Accruing 5,164 10,047  
Purchased Impaired (net of credit mark) 78,606 105,788 $ 119,743
Nonaccrual 12,966 19,255  
Current 5,424,509 5,172,879  
Total loans 5,543,621 5,345,996 $ 5,171,003
Commercial Construction [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 296 $ 815  
60-89 Days Past Due  
Greater Than 90 Days and still Accruing $ 126  
Purchased Impaired (net of credit mark) 2,459 $ 3,782  
Nonaccrual 1,786 968  
Current 424,978 335,715  
Total loans 429,645 341,280  
Commercial Real Estate - Owner Occupied [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 1,148 621  
60-89 Days Past Due 165 1,542  
Greater Than 90 Days and still Accruing 680 1,683  
Purchased Impaired (net of credit mark) 28,695 31,167  
Nonaccrual 3,989 1,060  
Current 828,874 839,370  
Total loans 863,551 875,443  
Commercial Real Estate - Non-Owner Occupied [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 752 3,984  
60-89 Days Past Due 974 237  
Greater Than 90 Days and still Accruing 1,821 91  
Purchased Impaired (net of credit mark) 15,172 28,869  
Nonaccrual 200 5,902  
Current 1,567,415 1,470,076  
Total loans 1,586,334 1,509,159  
Raw Land and Lots [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 93 145  
60-89 Days Past Due 44  
Greater Than 90 Days and still Accruing 194  
Purchased Impaired (net of credit mark) $ 5,141 7,427  
Nonaccrual 493 2,359  
Current 181,455 201,056  
Total loans 187,182 211,225  
Single Family Investment Real Estate [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 536 2,825  
60-89 Days Past Due 35 338  
Greater Than 90 Days and still Accruing 228 734  
Purchased Impaired (net of credit mark) 15,167 16,879  
Nonaccrual 1,157 2,070  
Current 419,217 389,648  
Total loans 436,340 412,494  
Commercial and Industrial [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 721 1,250  
60-89 Days Past Due 696 529  
Greater Than 90 Days and still Accruing 494 549  
Purchased Impaired (net of credit mark) 2,249 3,855  
Nonaccrual 903 3,286  
Current 439,136 384,307  
Total loans 444,199 393,776  
Other Commercial [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 643 42  
60-89 Days Past Due $ 2  
Greater Than 90 Days and still Accruing  
Purchased Impaired (net of credit mark) $ 793 $ 2,256  
Nonaccrual 61 74  
Current 87,847 78,732  
Total loans 89,344 81,106  
Mortgage [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 2,485 12,851  
60-89 Days Past Due 5,079 4,300  
Greater Than 90 Days and still Accruing 875 4,095  
Purchased Impaired (net of credit mark) 5,561 7,394  
Nonaccrual 2,276 2,485  
Current 450,142 447,026  
Total loans 466,418 478,151  
Consumer Construction [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 250 $ 120  
60-89 Days Past Due  
Greater Than 90 Days and still Accruing $ 844  
Purchased Impaired (net of credit mark) $ 251 $ 516  
Nonaccrual 819  
Current 54,398 $ 72,688  
Total loans 55,718 74,168  
Indirect Auto [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 1,319 1,593  
60-89 Days Past Due 270 263  
Greater Than 90 Days and still Accruing $ 116 $ 317  
Purchased Impaired (net of credit mark)  
Nonaccrual $ 89  
Current 216,134 $ 197,238  
Total loans 217,928 199,411  
Indirect Marine [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due $ 150 $ 150  
60-89 Days Past Due  
Greater Than 90 Days and still Accruing $ 94  
Purchased Impaired (net of credit mark)  
Nonaccrual $ 201  
Current $ 42,519 42,839  
Total loans 42,763 43,190  
HELOCs [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 3,192 3,082  
60-89 Days Past Due 1,085 955  
Greater Than 90 Days and still Accruing 282 820  
Purchased Impaired (net of credit mark) 1,812 2,000  
Nonaccrual 611 258  
Current 485,220 493,464  
Total loans 492,202 500,579  
Credit Card [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due   232  
60-89 Days Past Due   108  
Greater Than 90 Days and still Accruing   $ 219  
Purchased Impaired (net of credit mark)    
Nonaccrual    
Current   $ 23,666  
Total loans   24,225  
Other Consumer [Member]      
Summary of aging of the loan portfolio, by class      
30-59 Days Past Due 1,521 1,587  
60-89 Days Past Due 966 412  
Greater Than 90 Days and still Accruing 448 501  
Purchased Impaired (net of credit mark) 1,306 1,643  
Nonaccrual 582 592  
Current 227,174 197,054  
Total loans $ 231,997 $ 201,789