Quarterly report pursuant to Section 13 or 15(d)

LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology) (Details)

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LOANS AND ALLOWANCE FOR LOAN LOSSES (Allowance for Loan Loss Activity, by Portfolio Segment, Balances for Allowance for Credit Losses, and Loans Based on Impairment Methodology) (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Dec. 31, 2014
Sep. 30, 2014
Allowance for loan losses:          
Balance, beginning of the year $ 32,384 $ 30,135      
Recoveries credited to allowance 2,994 2,865      
Loans charged off (9,370) (4,191)      
Provision charged to operations 7,261 3,300      
Balance, end of period 33,269 32,109      
Ending balance: individually evaluated for impairment     $ 2,012   $ 4,105
Ending balance: collectively evaluated for impairment     31,257   28,004
Total 32,384 30,135 33,269 $ 32,384 32,109
Loans:          
Ending balance: individually evaluated for impairment     81,618   134,165
Ending balance: collectively evaluated for impairment     5,383,397   4,917,095
Ending balance: loans acquired with deteriorated credit quality     78,606 105,788 119,743
Total loans     5,543,621 5,345,996 5,171,003
Commercial [Member]          
Allowance for loan losses:          
Balance, beginning of the year 22,352 19,908      
Recoveries credited to allowance 1,921 1,999      
Loans charged off (6,013) (1,991)      
Provision charged to operations 5,364 1,507      
Balance, end of period 23,624 21,423      
Ending balance: individually evaluated for impairment     1,529   3,183
Ending balance: collectively evaluated for impairment     22,095   18,240
Total 22,352 19,908 23,624 22,352 21,423
Loans:          
Ending balance: individually evaluated for impairment     75,308   125,310
Ending balance: collectively evaluated for impairment     3,891,611   3,430,451
Ending balance: loans acquired with deteriorated credit quality     69,676 94,235 106,021
Total loans     4,036,595   3,661,782
Consumer [Member]          
Allowance for loan losses:          
Balance, beginning of the year 10,032 10,227      
Recoveries credited to allowance 1,073 866      
Loans charged off (3,357) (2,200)      
Provision charged to operations 1,897 1,793      
Balance, end of period 9,645 10,686      
Ending balance: individually evaluated for impairment     483   922
Ending balance: collectively evaluated for impairment     9,162   9,764
Total $ 10,032 $ 10,227 9,645 $ 10,032 10,686
Loans:          
Ending balance: individually evaluated for impairment     6,310   8,855
Ending balance: collectively evaluated for impairment     1,491,786   1,486,644
Ending balance: loans acquired with deteriorated credit quality     8,930   13,722
Total loans     $ 1,507,026   $ 1,509,221