Annual report pursuant to Section 13 and 15(d)

BORROWINGS (Short-Term Borrowings) (Details)

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BORROWINGS (Short-Term Borrowings) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Debt Disclosure [Abstract]    
Securities sold under agreements to repurchase $ 59,281 $ 84,977
Other short-term borrowings 517,500 304,000
Total short-term borrowings 576,781 388,977
Maximum month-end outstanding balance 678,262 445,761
Average outstanding balance during the period $ 590,074 $ 379,783
Average interest rate during the period 0.49% 0.25%
Average interest rate at end of period 0.60% 0.27%
Other short-term borrowings:    
FHLB $ 517,500 $ 304,000
Other lines of credit $ 0 $ 0