Quarterly report pursuant to Section 13 or 15(d)

BORROWINGS (Narrative) (Details)

v3.5.0.2
BORROWINGS (Narrative) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jan. 01, 2014
USD ($)
Aug. 23, 2012
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
acquisition
Jun. 30, 2015
USD ($)
Dec. 31, 2015
USD ($)
Subordinated Borrowing [Line Items]              
Remaining available balance for the federal funds lines     $ 175,000   $ 175,000   $ 175,000
Maximum collateral dependent line of credit with the FHLB     2,300,000   2,300,000   1,500,000
Prepayment penalty   $ 19,600          
Prepayment penalty amortization expense     466 $ 455 930 $ 902  
Carrying value of the loans and securities pledged as collateral for FHLB     1,900,000   1,900,000   $ 1,900,000
Trust Preferred Capital Notes [Member]              
Subordinated Borrowing [Line Items]              
Trust preferred capital notes principal balance         $ 90,500    
Acquisitions, Prior To 2006 [Member]              
Subordinated Borrowing [Line Items]              
Number of bank acquisitions | acquisition         2    
Trust preferred capital notes principal balance         $ 58,500    
StellarOne [Member]              
Subordinated Borrowing [Line Items]              
Long-term FHLB borrowings $ 70,000   60,000   60,000    
Remaining fair value premium on acquired FHLB advances     875   875    
StellarOne [Member] | Trust Preferred Capital Notes [Member]              
Subordinated Borrowing [Line Items]              
Trust preferred capital notes principal balance $ 32,000            
Remaining fair value discount on acquired notes     $ 6,900   $ 6,900