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Allowance for Loan and Lease Losses (Tables)
 12 Months Ended
Dec. 31, 2017
Allowance for Loan and Lease Losses [Abstract]  
Activity in Allowance for Loan and Lease Losses
The following tables present the balance in the allowance for loan and lease losses (“ALLL”) and the recorded investment in loans based on portfolio segment and impairment method as of December 31, 2017, 2016, and 2015:

2017
                              
(in thousands)
 
Commercial Construction
  
Commercial Secured by Real Estate
  
Equipment Lease Financing
  
Commercial Other
  
Real Estate Construction
  
Real Estate Mortgage
  
Home Equity
  
Consumer Direct
  
Consumer Indirect
  
Total
 
ALLL
                              
Balance, beginning of year
 
$
884
  
$
14,191
  
$
42
  
$
4,656
  
$
629
  
$
6,027
  
$
774
  
$
1,885
  
$
6,845
  
$
35,933
 
Provision charged to expense
  
(237
)
  
2,281
   
(24
)
  
1,744
   
31
   
189
   
257
   
418
   
2,862
   
7,521
 
Losses charged off
  
(10
)
  
(2,038
)
  
0
   
(1,893
)
  
0
   
(615
)
  
(178
)
  
(965
)
  
(5,386
)
  
(11,085
)
Recoveries
  
49
   
75
   
0
   
532
   
0
   
87
   
4
   
525
   
2,510
   
3,782
 
Balance, end of year
 
$
686
  
$
14,509
  
$
18
  
$
5,039
  
$
660
  
$
5,688
  
$
857
  
$
1,863
  
$
6,831
  
$
36,151
 
                                         
Ending balance:
                                        
Individually evaluated for impairment
 
$
25
  
$
966
  
$
0
  
$
0
  
$
0
  
$
0
  
$
0
  
$
0
  
$
0
  
$
991
 
Collectively evaluated for impairment
 
$
661
  
$
13,543
  
$
18
  
$
5,039
  
$
660
  
$
5,688
  
$
857
  
$
1,863
  
$
6,831
  
$
35,160
 
                                         
Loans
                                        
Ending balance:
                                        
Individually evaluated for impairment
 
$
4,584
  
$
31,465
  
$
0
  
$
9,481
  
$
318
  
$
1,564
  
$
0
  
$
0
  
$
0
  
$
47,412
 
Collectively evaluated for impairment
 
$
71,895
  
$
1,157,215
  
$
3,042
  
$
341,553
  
$
67,040
  
$
708,006
  
$
99,356
  
$
137,754
  
$
489,667
  
$
3,075,528
 

2016
                              
(in thousands)
 
Commercial Construction
  
Commercial Secured by Real Estate
  
Equipment Lease Financing
  
Commercial Other
  
Real Estate Construction
  
Real Estate Mortgage
  
Home Equity
  
Consumer Direct
  
Consumer Indirect
  
Total
 
ALLL
                              
Balance, beginning of year
 
$
2,199
  
$
14,434
  
$
79
  
$
4,225
  
$
550
  
$
6,678
  
$
839
  
$
1,594
  
$
5,496
  
$
36,094
 
Provision charged to expense
  
(1,035
)
  
1,220
   
(37
)
  
2,128
   
264
   
291
   
(20
)
  
912
   
4,149
   
7,872
 
Losses charged off
  
(316
)
  
(1,641
)
  
0
   
(2,136
)
  
(192
)
  
(1,043
)
  
(54
)
  
(1,236
)
  
(5,050
)
  
(11,668
)
Recoveries
  
36
   
178
   
0
   
439
   
7
   
101
   
9
   
615
   
2,250
   
3,635
 
Balance, end of year
 
$
884
  
$
14,191
  
$
42
  
$
4,656
  
$
629
  
$
6,027
  
$
774
  
$
1,885
  
$
6,845
  
$
35,933
 
                                         
Ending balance:
                                        
Individually evaluated for impairment
 
$
213
  
$
1,035
  
$
0
  
$
65
  
$
0
  
$
0
  
$
0
  
$
0
  
$
0
  
$
1,313
 
Collectively evaluated for impairment
 
$
671
  
$
13,156
  
$
42
  
$
4,591
  
$
629
  
$
6,027
  
$
774
  
$
1,885
  
$
6,845
  
$
34,620
 
                                         
Loans
                                        
Ending balance:
                                        
Individually evaluated for impairment
 
$
5,609
  
$
33,756
  
$
0
  
$
11,354
  
$
0
  
$
1,483
  
$
0
  
$
0
  
$
0
  
$
52,202
 
Collectively evaluated for impairment
 
$
61,389
  
$
1,051,672
  
$
5,512
  
$
338,805
  
$
57,966
  
$
701,486
  
$
91,511
  
$
133,093
  
$
444,735
  
$
2,886,169
 

2015
                              
(in thousands)
 
Commercial Construction
  
Commercial Secured by Real Estate
  
Equipment Lease Financing
  
Commercial Other
  
Real Estate Construction
  
Real Estate Mortgage
  
Home Equity
  
Consumer Direct
  
Consumer Indirect
  
Total
 
ALLL
                              
Balance, beginning of year
 
$
2,896
  
$
13,618
  
$
119
  
$
4,263
  
$
534
  
$
6,094
  
$
756
  
$
1,574
  
$
4,593
  
$
34,447
 
Provision charged to expense
  
(707
)
  
2,135
   
(40
)
  
1,338
   
147
   
1,888
   
158
   
891
   
2,840
   
8,650
 
Losses charged off
  
(3
)
  
(1,379
)
  
0
   
(1,961
)
  
(135
)
  
(1,421
)
  
(129
)
  
(1,306
)
  
(3,536
)
  
(9,870
)
Recoveries
  
13
   
60
   
0
   
585
   
4
   
117
   
54
   
435
   
1,599
   
2,867
 
Balance, end of year
 
$
2,199
  
$
14,434
  
$
79
  
$
4,225
  
$
550
  
$
6,678
  
$
839
  
$
1,594
  
$
5,496
  
$
36,094
 
                                         
Ending balance:
                                        
Individually evaluated for impairment
 
$
831
  
$
1,227
  
$
0
  
$
403
  
$
0
  
$
0
  
$
0
  
$
0
  
$
0
  
$
2,461
 
Collectively evaluated for impairment
 
$
1,368
  
$
13,207
  
$
79
  
$
3,822
  
$
550
  
$
6,678
  
$
839
  
$
1,594
  
$
5,496
  
$
33,633
 
                                         
Loans
                                        
Ending balance:
                                        
Individually evaluated for impairment
 
$
6,263
  
$
33,421
  
$
0
  
$
8,460
  
$
0
  
$
1,744
  
$
0
  
$
0
  
$
0
  
$
49,888
 
Collectively evaluated for impairment
 
$
71,757
  
$
1,019,498
  
$
8,514
  
$
350,438
  
$
61,750
  
$
706,130
  
$
89,450
  
$
126,406
  
$
390,130
  
$
2,824,073