Quarterly report pursuant to Section 13 or 15(d)

LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details)

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LOANS / LEASES AND ALLOWANCE FOR CREDIT LOSSES - ALLL Attributable to Loans by Portfolio Segment (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment $ 692,000   $ 650,000      
Attributable to loans individually evaluated for impairment 49,000   41,000      
Total ALLL balance 741,000 $ 721,000 691,000 $ 668,000 $ 673,000 $ 638,000
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 71,081,000   68,760,000      
Individually evaluated for impairment 1,241,000   1,223,000      
Financing Receivable Evaluated For Impairment 72,322,000   70,024,000      
Commercial            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 492,000   450,000      
Attributable to loans individually evaluated for impairment 39,000   32,000      
Total ALLL balance 531,000 515,000 482,000 475,000 480,000 451,000
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 35,409,000   34,684,000      
Individually evaluated for impairment 642,000   607,000      
Financing Receivable Evaluated For Impairment 36,051,000   35,332,000      
Consumer            
Portion of ALLL balance:            
Attributable to loans collectively evaluated for impairment 200,000   200,000      
Attributable to loans individually evaluated for impairment 10,000   9,000      
Total ALLL balance 210,000 $ 206,000 209,000 $ 193,000 $ 193,000 $ 187,000
Portion of loan and lease ending balance:            
Collectively evaluated for impairment 35,672,000   34,076,000      
Individually evaluated for impairment 599,000   616,000      
Financing Receivable Evaluated For Impairment $ 36,271,000   34,692,000      
Purchased credit-impaired            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     41,000      
Purchased credit-impaired | Commercial            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     41,000      
Purchased credit-impaired | Consumer            
Portion of loan and lease ending balance:            
Collectively evaluated for impairment     $ 0