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Allowance for Loan Losses (Tables)
 9 Months Ended
Sep. 30, 2018
Receivables [Abstract]  
Schedule of Age Analysis of Past Due Loans Segregated by Class of Loans
The following tables present the age analysis of past due loans segregated by class of loans as of the dates presented:
 
September 30, 2018
(dollars in thousands)
Current

 
30-59 Days
Past Due

 
60-89 Days
Past Due

 
Non - performing

 
Total Past
Due Loans

 
Total Loans

Commercial real estate
$
2,820,689

 
$
664

 
$
424

 
$
4,595

 
$
5,683

 
$
2,826,372

Commercial and industrial
1,445,433

 
1,400

 
171

 
4,367

 
5,938

 
1,451,371

Commercial construction
282,489

 
66

 
—

 
1,228

 
1,294

 
283,783

Residential mortgage
689,464

 
2,242

 
1,440

 
6,721

 
10,403

 
699,867

Home equity
465,625

 
2,590

 
453

 
3,783

 
6,826

 
472,451

Installment and other consumer
67,291

 
135

 
71

 
45

 
251

 
67,542

Consumer construction
6,421

 
—

 
—

 
—

 
—

 
6,421

Loans held for sale
4,207

 
—

 
—

 
—

 
—

 
4,207

Total
$
5,781,619

 
$
7,097

 
$
2,559

 
$
20,739

 
$
30,395

 
$
5,812,014


 
December 31, 2017
(dollars in thousands)
Current

 
30-59 Days
Past Due

 
60-89 Days
Past Due

 
Non - performing

 
Total Past
Due Loans

 
Total Loans

Commercial real estate
$
2,681,395

 
$
997

 
$
134

 
$
3,468

 
$
4,599

 
$
2,685,994

Commercial and industrial
1,426,754

 
420

 
446

 
5,646

 
6,512

 
1,433,266

Commercial construction
377,968

 
2,473

 
20

 
3,873

 
6,366

 
384,334

Residential mortgage
687,195

 
2,975

 
1,439

 
7,165

 
11,579

 
698,774

Home equity
480,956

 
2,065

 
590

 
3,715

 
6,370

 
487,326

Installment and other consumer
66,770

 
193

 
170

 
71

 
434

 
67,204

Consumer construction
4,551

 
—

 
—

 
—

 
—

 
4,551

Loans held for sale
4,485

 
—

 
—

 
—

 
—

 
4,485

Total
$
5,730,074

 
$
9,123

 
$
2,799

 
$
23,938

 
$
35,860

 
$
5,765,934
Schedule of Recorded Investment in Commercial Loan Classes by Internally Assigned Risk Ratings
The following tables present the recorded investment in commercial loan classes by internally assigned risk ratings as of the dates presented:
 
September 30, 2018
(dollars in thousands)
Commercial
Real Estate
% of
Total
 
Commercial
and Industrial
% of
Total
 
Commercial
Construction
% of
Total
 
Total
% of
Total
Pass
$
2,665,516

94.3
%
 
$
1,356,159

93.4
%
 
$
256,227

90.3
%
 
$
4,277,902

93.8
%
Special mention
76,906

2.7
%
 
38,306

2.6
%
 
9,914

3.5
%
 
125,126

2.7
%
Substandard
83,950

3.0
%
 
56,906

4.0
%
 
17,642

6.2
%
 
158,498

3.5
%
Total
$
2,826,372

100.0
%
 
$
1,451,371

100.0
%
 
$
283,783

100.0
%
 
$
4,561,526

100.0
%
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2017
(dollars in thousands)
Commercial
Real Estate
% of
Total
 
Commercial
and Industrial
% of
Total
 
Commercial
Construction
% of
Total
 
Total
% of
Total
Pass
$
2,588,847

96.4
%
 
$
1,345,810

93.9
%
 
$
368,105

95.8
%
 
$
4,302,762

95.5
%
Special mention
66,436

2.5
%
 
54,320

3.8
%
 
9,345

2.4
%
 
130,101

2.9
%
Substandard
30,711

1.1
%
 
33,136

2.3
%
 
6,884

1.8
%
 
70,731

1.6
%
Total
$
2,685,994

100.0
%
 
$
1,433,266

100.0
%
 
$
384,334

100.0
%
 
$
4,503,594

100.0
%
Schedule of Recorded Investment in Consumer Loan Classes by Performing and Nonperforming Status
The following tables present the recorded investment in consumer loan classes by performing and nonperforming status as of the dates presented:
 
September 30, 2018
(dollars in thousands)
Residential
Mortgage
% of
Total
 
Home
Equity
% of
Total
 
Installment
and Other
Consumer
% of
Total
 
Consumer
Construction
% of
Total
 
Total
% of
Total
Performing
$
693,146

99.0
%
 
$
468,668

99.2
%
 
$
67,497

99.9
%
 
$
6,421

100.0
%
 
$
1,235,732

99.2
%
Nonperforming
6,721

1.0
%
 
3,783

0.8
%
 
45

0.1
%
 
—

—
%
 
10,549

0.8
%
Total
$
699,867

100.0
%
 
$
472,451

100.0
%
 
$
67,542

100.0
%
 
$
6,421

100.0
%
 
$
1,246,281

100.0
%
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
December 31, 2017
(dollars in thousands)
Residential
Mortgage
% of
Total
 
Home
Equity
% of
Total
 
Installment
and Other
Consumer
% of
Total
 
Consumer
Construction
% of
Total
 
Total
% of
Total
Performing
$
691,609

99.0
%
 
$
483,611

99.2
%
 
$
67,133

99.9
%
 
$
4,551

100.0
%
 
$
1,246,904

99.1
%
Nonperforming
7,165

1.0
%
 
3,715

0.8
%
 
71

0.1
%
 
—

—
%
 
10,951

0.9
%
Total
$
698,774

100.0
%
 
$
487,326

100.0
%
 
$
67,204

100.0
%
 
$
4,551

100.0
%
 
$
1,257,855

100.0
%
Schedule of Investments in Loans Considered to be Impaired and Related Information on Impaired Loans
The following tables summarize average recorded investment in and interest income recognized on loans considered to be impaired for the periods presented:
 
Three Months Ended
 
September 30, 2018
 
September 30, 2017
(dollars in thousands)
Average
Recorded
Investment
 
Interest
Income
Recognized
 
Average
Recorded
Investment
 
Interest
Income
Recognized
With a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
$
—

 
$
—

 
$
—

 
$
—

Commercial and industrial
—

 
—

 
2,406

 
37

Commercial construction
496

 
—

 
—

 
—

Consumer real estate
15

 
—

 
23

 
1

Other consumer
17

 
1

 
32

 
2

Total with a Related Allowance Recorded
528

 
1

 
2,461

 
40

Without a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
3,744

 
41

 
6,415

 
105

Commercial and industrial
14,412

 
73

 
9,074

 
130

Commercial construction
2,809

 
61

 
7,140

 
154

Consumer real estate
9,320

 
112

 
11,149

 
250

Other consumer
13

 
—

 
28

 
—

Total without a Related Allowance Recorded
30,298

 
287

 
33,806

 
639

Total:
 
 
 
 
 
 
 
Commercial real estate
3,744

 
41

 
6,415

 
105

Commercial and industrial
14,412

 
73

 
11,480

 
167

Commercial construction
3,305

 
61

 
7,140

 
154

Consumer real estate
9,335

 
112

 
11,172

 
251

Other consumer
30

 
1

 
60

 
2

Total
$
30,826

 
$
288

 
$
36,267

 
$
679

 
Nine Months Ended
 
September 30, 2018
 
September 30, 2017
(dollars in thousands)
Average
Recorded
Investment
 
Interest
Income
Recognized
 
Average
Recorded
Investment
 
Interest
Income
Recognized
With a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
$
—

 
$
—

 
$
—

 
$
—

Commercial and industrial
—

 
—

 
1,218

 
44

Commercial construction
585

 
—

 
—

 
—

Consumer real estate
16

 
1

 
24

 
1

Other consumer
21

 
1

 
35

 
1

Total with a Related Allowance Recorded
622

 
2

 
1,277

 
46

Without a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
3,895

 
126

 
6,577

 
140

Commercial and industrial
11,567

 
232

 
11,001

 
164

Commercial construction
2,813

 
134

 
7,222

 
194

Consumer real estate
10,031

 
370

 
11,488

 
382

Other consumer
15

 
—

 
33

 
1

Total without a Related Allowance Recorded
28,321

 
862

 
36,321

 
881

Total:
 
 
 
 
 
 
 
Commercial real estate
3,895

 
126

 
6,577

 
140

Commercial and industrial
11,567

 
232

 
12,219

 
208

Commercial construction
3,398

 
134

 
7,222

 
194

Consumer real estate
10,047

 
371

 
11,512

 
383

Other consumer
36

 
1

 
68

 
2

Total
$
28,943

 
$
864

 
$
37,598

 
$
927


 
Nine Months Ended
 
September 30, 2018
 
September 30, 2017
(dollars in thousands)
Average
Recorded
Investment
 
Interest
Income
Recognized
 
Average
Recorded
Investment
 
Interest
Income
Recognized
With a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
$
—

 
$
—

 
$
—

 
$
—

Commercial and industrial
—

 
—

 
1,218

 
44

Commercial construction
585

 
—

 
—

 
—

Consumer real estate
16

 
1

 
24

 
1

Other consumer
21

 
1

 
35

 
1

Total with a Related Allowance Recorded
622

 
2

 
1,277

 
46

Without a related allowance recorded:
 
 
 
 
 
 
 
Commercial real estate
3,895

 
126

 
6,577

 
140

Commercial and industrial
11,567

 
232

 
11,001

 
164

Commercial construction
2,813

 
134

 
7,222

 
194

Consumer real estate
10,031

 
370

 
11,488

 
382

Other consumer
15

 
—

 
33

 
1

Total without a Related Allowance Recorded
28,321

 
862

 
36,321

 
881

Total:
 
 
 
 
 
 
 
Commercial real estate
3,895

 
126

 
6,577

 
140

Commercial and industrial
11,567

 
232

 
12,219

 
208

Commercial construction
3,398

 
134

 
7,222

 
194

Consumer real estate
10,047

 
371

 
11,512

 
383

Other consumer
36

 
1

 
68

 
2

Total
$
28,943

 
$
864

 
$
37,598

 
$
927

The following table summarizes investments in loans considered to be impaired and related information on those impaired loans as of the dates presented:
 
September 30, 2018
 
December 31, 2017
(dollars in thousands)
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
With a related allowance recorded:
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate
$
—

 
$
—

 
$
—

 
$
—

 
$
—

 
$
—

Commercial and industrial
—

 
—

 
—

 
1,735

 
1,787

 
29

Commercial construction
490

 
489

 
268

 
—

 
—

 
—

Consumer real estate
15

 
15

 
10

 
21

 
21

 
21

Other consumer
15

 
16

 
16

 
27

 
27

 
27

Total with a Related Allowance Recorded
520

 
520

 
294

 
1,783

 
1,835

 
77

Without a related allowance recorded:
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate
3,703

 
4,069

 
—

 
3,546

 
3,811

 
—

Commercial and industrial
14,548

 
16,271

 
—

 
5,549

 
7,980

 
—

Commercial construction
2,808

 
4,318

 
—

 
5,464

 
8,132

 
—

Consumer real estate
9,142

 
10,138

 
—

 
10,467

 
11,357

 
—

Other consumer
7

 
15

 
—

 
14

 
22

 
—

Total without a Related Allowance Recorded
30,208

 
34,811

 
—

 
25,040

 
31,302

 
—

Total:
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate
3,703

 
4,069

 
—

 
3,546

 
3,811

 
—

Commercial and industrial
14,548

 
16,271

 
—

 
7,284

 
9,767

 
29

Commercial construction
3,298

 
4,807

 
268

 
5,464

 
8,132

 
—

Consumer real estate
9,157

 
10,153

 
10

 
10,488

 
11,378

 
21

Other consumer
22

 
31

 
16

 
41

 
49

 
27

Total
$
30,728

 
$
35,331

 
$
294

 
$
26,823

 
$
33,137

 
$
77
Schedule of Summary of Allowance for Loan Losses
The following tables detail activity in the ALLL for the periods presented:
 
Three Months Ended September 30, 2018
(dollars in thousands)
Commercial
Real Estate
 
Commercial and
Industrial
 
Commercial
Construction
 
Consumer
Real Estate
 
Other
Consumer
 
Total
Loans
Balance at beginning of period
$
31,232

 
$
10,874

 
$
11,676

 
$
5,241

 
$
1,494

 
$
60,517

Charge-offs
(141
)
 
(181
)
 
—

 
(487
)
 
(425
)
 
(1,234
)
Recoveries
64

 
504

 
4

 
70

 
169

 
811

Net (Charge-offs)/ Recoveries
(77
)
 
323

 
4

 
(417
)
 
(256
)
 
(423
)
Provision for loan losses
1,735

 
(971
)
 
(765
)
 
214

 
249

 
462

Balance at End of Period
$
32,890

 
$
10,226

 
$
10,915

 
$
5,038

 
$
1,487

 
$
60,556

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended September 30, 2017
(dollars in thousands)
Commercial
Real Estate
 
Commercial and
Industrial
 
Commercial
Construction
 
Consumer
Real Estate
 
Other
Consumer
 
Total
Loans
Balance at beginning of period
$
24,358

 
$
9,256

 
$
13,944

 
$
5,803

 
$
1,990

 
$
55,351

Charge-offs
(37
)
 
(644
)
 
(1,453
)
 
(101
)
 
(425
)
 
(2,660
)
Recoveries
182

 
243

 
473

 
91

 
182

 
1,171

Net (Charge-offs)/ Recoveries
145

 
(401
)
 
(980
)
 
(10
)
 
(243
)
 
(1,489
)
Provision for loan losses
472

 
859

 
1,951

 
(262
)
 
(170
)
 
2,850

Balance at End of Period
$
24,975

 
$
9,714

 
$
14,915

 
$
5,531

 
$
1,577

 
$
56,712

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2018
(dollars in thousands)
Commercial
Real Estate
 
Commercial and
Industrial
 
Commercial
Construction
 
Consumer
Real Estate
 
Other
Consumer
 
Total
Loans
Balance at beginning of period
$
27,235

 
$
8,966

 
$
13,167

 
$
5,479

 
$
1,543

 
$
56,390

Charge-offs
(373
)
 
(8,403
)
 
(321
)
 
(916
)
 
(1,298
)
 
(11,311
)
Recoveries
293

 
985

 
1,134

 
393

 
393

 
3,198

Net (Charge-offs)/Recoveries
(80
)
 
(7,418
)
 
813

 
(523
)
 
(905
)
 
(8,113
)
Provision for loan losses
5,735

 
8,678

 
(3,065
)
 
82

 
849

 
12,279

Balance at End of Period
$
32,890

 
$
10,226

 
$
10,915

 
$
5,038

 
$
1,487

 
$
60,556

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Nine Months Ended September 30, 2017
(dollars in thousands)
Commercial
Real Estate
 
Commercial and
Industrial
 
Commercial
Construction
 
Consumer
Real Estate
 
Other
Consumer
 
Total
Loans
Balance at beginning of period
$
19,976

 
$
10,810

 
$
13,999

 
$
6,095

 
$
1,895

 
$
52,775

Charge-offs
(2,100
)
 
(4,041
)
 
(2,097
)
 
(1,957
)
 
(1,228
)
 
(11,423
)
Recoveries
415

 
499

 
842

 
270

 
433

 
2,459

Net Charge-offs
(1,685
)
 
(3,542
)
 
(1,255
)
 
(1,687
)
 
(795
)
 
(8,964
)
Provision for loan losses
6,684

 
2,446

 
2,171

 
1,123

 
477

 
12,901

Balance at End of Period
$
24,975

 
$
9,714

 
$
14,915

 
$
5,531

 
$
1,577

 
$
56,712
Schedule of Summary of Allowance for Loan Losses and Recorded Investments
The following tables present the ALLL and recorded investments in loans by category as of the periods presented:
 
September 30, 2018
 
Allowance for Loan Losses
 
Portfolio Loans
(dollars in thousands)
Individually
Evaluated for
Impairment

 
Collectively
Evaluated for
Impairment

 
Total

 
Individually
Evaluated for
Impairment

 
Collectively
Evaluated for
Impairment

 
Total

Commercial real estate
$
—

 
$
32,890

 
$
32,890

 
$
3,703

 
$
2,822,669

 
$
2,826,372

Commercial and industrial
—

 
10,226

 
10,226

 
14,548

 
1,436,823

 
1,451,371

Commercial construction
268

 
10,647

 
10,915

 
3,298

 
280,485

 
283,783

Consumer real estate
10

 
5,028

 
5,038

 
9,157

 
1,169,582

 
1,178,739

Other consumer
16

 
1,471

 
1,487

 
22

 
67,520

 
67,542

Total
$
294

 
$
60,262

 
$
60,556

 
$
30,728

 
$
5,777,079

 
$
5,807,807

 
 
December 31, 2017
 
Allowance for Loan Losses
 
Portfolio Loans
(dollars in thousands)
Individually
Evaluated for
Impairment

 
Collectively
Evaluated for
Impairment

 
Total

 
Individually
Evaluated for
Impairment

 
Collectively
Evaluated for
Impairment

 
Total

Commercial real estate
$
—

 
$
27,235

 
$
27,235

 
$
3,546

 
$
2,682,448

 
$
2,685,994

Commercial and industrial
29

 
8,937

 
8,966

 
7,284

 
1,425,982

 
1,433,266

Commercial construction
—

 
13,167

 
13,167

 
5,464

 
378,870

 
384,334

Consumer real estate
21

 
5,458

 
5,479

 
10,488

 
1,180,163

 
1,190,651

Other consumer
27

 
1,516

 
1,543

 
41

 
67,163

 
67,204

Total
$
77

 
$
56,313

 
$
56,390

 
$
26,823

 
$
5,734,626

 
$
5,761,449