LOANS (Details 2) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2013
Unallocated
Dec. 31, 2012
Unallocated
Dec. 31, 2011
Unallocated
Dec. 31, 2010
Unallocated
Dec. 31, 2013
Commercial
Dec. 31, 2012
Commercial
Dec. 31, 2013
Commercial
Commercial real estate
Dec. 31, 2012
Commercial
Commercial real estate
Dec. 31, 2011
Commercial
Commercial real estate
Dec. 31, 2013
Commercial
Commercial business loans
Dec. 31, 2012
Commercial
Commercial business loans
Dec. 31, 2011
Commercial
Commercial business loans
Dec. 31, 2013
Commercial
Commercial construction
Dec. 31, 2012
Commercial
Commercial construction
Dec. 31, 2011
Commercial
Commercial construction
Dec. 31, 2013
Residential
Dec. 31, 2012
Residential
Dec. 31, 2013
Residential
Residential real estate
Dec. 31, 2012
Residential
Residential real estate
Dec. 31, 2011
Residential
Residential real estate
Dec. 31, 2013
Residential
Residential construction
Dec. 31, 2012
Residential
Residential construction
Dec. 31, 2011
Residential
Residential construction
Dec. 31, 2013
Consumer
Dec. 31, 2012
Consumer
Dec. 31, 2013
Consumer
Home equity and equity lines
Dec. 31, 2012
Consumer
Home equity and equity lines
Dec. 31, 2011
Consumer
Home equity and equity lines
Dec. 31, 2013
Consumer
Personal
Dec. 31, 2012
Consumer
Personal
Dec. 31, 2011
Consumer
Personal
Dec. 31, 2013
Consumer
Education
Dec. 31, 2012
Consumer
Education
Dec. 31, 2011
Consumer
Education
Dec. 31, 2013
Consumer
Auto
Dec. 31, 2012
Consumer
Auto
Dec. 31, 2011
Consumer
Auto
Allowance for credit losses:                                                                                
Balance, beginning of year $ 57,649 $ 54,213 $ 45,366 $ 550 $ 550 $ 550 $ 550     $ 21,994 $ 16,254 $ 14,793 $ 18,088 $ 15,376 $ 14,407 $ 8,242 $ 14,791 $ 9,296     $ 2,293 $ 1,620 $ 1,854 $ 142 $ 65 $ 30     $ 2,397 $ 2,020 $ 2,136 $ 2,062 $ 1,855 $ 977 $ 303 $ 279 $ 297 $ 1,578 $ 1,403 $ 1,026
Charge-offs 20,337 27,340 35,034             7,795 7,590 8,508 5,340 9,867 5,897 3,539 5,803 16,063     836 736 968 215 479 36     740 979 587 654 681 1,643 105 135 147 1,113 1,070 1,185
Recoveries 5,337 2,776 6,381             1,785 218 651 902 905 1,027 1,058 675 3,333     430 36 28           255 253 461 182 201 310       725 488 571
Provision (credit) for loan losses 13,000 28,000 37,500             6,105 13,112 9,318 5,651 11,674 5,839 (2,573) (1,421) 18,225     313 1,373 706 73 556 71     1,221 1,103 10 1,097 687 2,211 108 159 129 1,005 757 991
Balance, end of period 55,649 57,649 54,213 550 550 550 550     22,089 21,994 16,254 19,301 18,088 15,376 3,188 8,242 14,791     2,200 2,293 1,620   142 65     3,133 2,397 2,020 2,687 2,062 1,855 306 303 279 2,195 1,578 1,403
Allowance for credit losses:                                                                                
Collectively evaluated for impairment 55,649 57,649 54,213 550 550 550       22,089 21,994 16,254 19,301 18,088 15,376 3,188 8,242 14,791     2,200 2,293 1,620   142 65     3,133 2,397 2,020 2,687 2,062 1,855 306 303 279 2,195 1,578 1,403
Total Allowance 55,649 57,649 54,213 550 550 550 550     22,089 21,994 16,254 19,301 18,088 15,376 3,188 8,242 14,791     2,200 2,293 1,620   142 65     3,133 2,397 2,020 2,687 2,062 1,855 306 303 279 2,195 1,578 1,403
Financing receivables:                                                                                
Individually evaluated impairment 70,902 87,192 125,698             28,027 37,358 38,324 26,022 18,748 31,666 2,518 13,407 40,349     12,827 15,075 12,477 130 783 1,850     1,120 1,110 499 107 592 436       151 119 97
Collectively evaluated impairment 2,270,406 2,357,764 2,450,431             555,998 601,981 508,686 352,641 313,421 397,600 35,345 89,866 193,196     670,686 649,815 611,478 147 1,311 3,731     233,034 257,389 268,294 40,785 55,258 72,658 206,521 217,896 234,844 175,249 170,827 159,944
Loans acquired with deteriorated credit quality 499 2,348               108 218         204 1,774       187 356                                    
Total Portfolio $ 2,341,807 $ 2,447,304 $ 2,576,129         $ 1,000,863 $ 1,076,773 $ 584,133 $ 639,557 $ 547,010 $ 378,663 $ 332,169 $ 429,266 $ 38,067 $ 105,047 $ 233,545 $ 683,977 $ 667,340 $ 683,700 $ 665,246 $ 623,955 $ 277 $ 2,094 $ 5,581 $ 656,967 $ 703,191 $ 234,154 $ 258,499 $ 268,793 $ 40,892 $ 55,850 $ 73,094 $ 206,521 $ 217,896 $ 234,844 $ 175,400 $ 170,946 $ 160,041
Collateral or discounted cash flow deficiency for loans, period when charged off 90 days