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Loans, Allowance for Loan Losses and Credit Quality (Tables)
 3 Months Ended
Mar. 31, 2019
Loans, Allowance for Loan Losses and Credit Quality [Abstract]  
Tabular disclosure of financing receivables bifurcated by type of impairment evaluation [Table Text Block] The following tables bifurcate the amount of loans and the allowance allocated to each loan category based on the type of impairment analysis as of the periods indicated:
 
March 31, 2019
 
 
(Dollars in thousands)
 
 
Commercial and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small
Business
 
Residential
Real Estate
 

Home Equity
 
Other Consumer
 
Total
 
Financing receivables ending balance:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Collectively evaluated for impairment
$
1,122,411

 
$
3,238,857

 
$
373,206

 
$
165,931

 
$
919,599

 
$
1,074,668

 
$
16,062

 
$
6,910,734

  
Individually evaluated for impairment
$
28,221

 
$
10,323

 
$
311

 
$
479

 
$
12,061

 
$
5,900

 
$
187

 
$
57,482

  
Purchased credit impaired loans
$
—

 
$
4,905

 
$
—

 
$
—

 
$
3,578

 
$
173

 
$
—

 
$
8,656

 
Total loans by group
$
1,150,632

 
$
3,254,085

 
$
373,517

 
$
166,410

 
$
935,238

 
$
1,080,741

 
$
16,249

 
$
6,976,872

(1
)
 
December 31, 2018
 
 
(Dollars in thousands)
 
 
Commercial and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small
Business
 
Residential
Real Estate
 

Home Equity
 
Other Consumer
 
Total
 
Financing receivables ending balance:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Collectively evaluated for impairment
$
1,064,800

 
$
3,235,418

 
$
365,165

 
$
164,135

 
$
906,959

 
$
1,085,961

 
$
15,901

 
$
6,838,339

 
Individually evaluated for impairment
$
28,829

 
$
10,839

 
$
—

 
$
541

 
$
12,706

 
$
5,948

 
$
197

 
$
59,060

  
Purchased credit impaired loans
$
—

 
$
4,991

 
$
—

 
$
—

 
$
3,629

 
$
175

 
$
—

 
$
8,795

 
Total loans by group
$
1,093,629

 
$
3,251,248

 
$
365,165

 
$
164,676

 
$
923,294

 
$
1,092,084

 
$
16,098

 
$
6,906,194

(1
)
 
(1)
The amount of net deferred costs on originated loans included in the ending balance was $7.3 million and $7.1 million at March 31, 2019 and December 31, 2018, respectively. Net unamortized discounts on acquired loans not deemed to be purchased credit impaired ("PCI") included in the ending balance was $14.3 million and $15.2 million at March 31, 2019 and December 31, 2018, respectively.
Summary of changes in allowance for loan losses The following tables summarize changes in allowance for loan losses by loan category for the periods indicated:

 
Three Months Ended March 31, 2019
 
(Dollars in thousands)
 
Commercial and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small
Business
 
Residential
Real Estate
 

Home Equity
 
Other Consumer
 
Total
Allowance for loan losses
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
$
15,760

 
$
32,370

 
$
5,158

 
$
1,756

 
$
3,219

 
$
5,608

 
$
422

 
$
64,293

Charge-offs
—

 
—

 
—

 
(145
)
 
—

 
(113
)
 
(301
)
 
(559
)
Recoveries
124

 
33

 
—

 
27

 
1

 
66

 
155

 
406

Provision (benefit)
988

 
(354
)
 
197

 
146

 
14

 
(54
)
 
63

 
1,000

Ending balance
$
16,872

 
$
32,049

 
$
5,355

 
$
1,784

 
$
3,234

 
$
5,507

 
$
339

 
$
65,140

Ending balance: collectively evaluated for impairment
$
16,814

 
$
31,974

 
$
5,355

 
$
1,783

 
$
2,432

 
$
5,346

 
$
332

 
$
64,036

Ending balance: individually evaluated for impairment
$
58

 
$
75

 
$
—

 
$
1

 
$
802

 
$
161

 
$
7

 
$
1,104

 
Three Months Ended March 31, 2018
 
(Dollars in thousands)
 
Commercial and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small
Business
 
Residential
Real Estate
 

Home Equity
 
Other Consumer
 
Total
Allowance for loan losses
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
$
13,256

 
$
31,453

 
$
5,698

 
$
1,577

 
$
2,822

 
$
5,390

 
$
447

 
$
60,643

Charge-offs
(133
)
 
—

 
—

 
(24
)
 
(39
)
 
(79
)
 
(318
)
 
(593
)
Recoveries
12

 
20

 
—

 
9

 
2

 
34

 
235

 
312

Provision (benefit)
398

 
(14
)
 
(19
)
 
31

 
52

 
14

 
38

 
500

Ending balance
$
13,533

 
$
31,459

 
$
5,679

 
$
1,593

 
$
2,837

 
$
5,359

 
$
402

 
$
60,862

Ending balance: collectively evaluated for impairment
$
13,524

 
$
31,422

 
$
5,679

 
$
1,590

 
$
1,893

 
$
5,111

 
$
386

 
$
59,605

Ending balance: individually evaluated for impairment
$
9

 
$
37

 
$
—

 
$
3

 
$
944

 
$
248

 
$
16

 
$
1,257
Internal risk-rating categories for the Company's commercial portfolio The following tables detail the amount of outstanding principal balances relative to each of the risk-rating categories for the Company’s commercial portfolio:
 
 
 
March 31, 2019
Category
Risk
Rating
 
Commercial  and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small Business
 
Total
 
 
 
(Dollars in thousands)
Pass
1 - 6
 
$
1,043,472

 
$
3,135,926

 
$
368,450

 
$
163,671

 
$
4,711,519

Potential weakness
7
 
53,712

 
85,126

 
2,248

 
867

 
141,953

Definite weakness-loss unlikely
8
 
53,448

 
33,033

 
2,819

 
1,872

 
91,172

Partial loss probable
9
 
—

 
—

 
—

 
—

 
—

Definite loss
10
 
—

 
—

 
—

 
—

 
—

Total
 
 
$
1,150,632

 
$
3,254,085

 
$
373,517

 
$
166,410

 
$
4,944,644


 
 
 
December 31, 2018
Category
Risk
Rating
 
Commercial  and
Industrial
 
Commercial
Real Estate
 
Commercial
Construction
 
Small Business
 
Total
 
 
 
(Dollars in thousands)
Pass
1 - 6
 
$
1,014,370

 
$
3,156,989

 
$
361,884

 
$
161,851

 
$
4,695,094

Potential weakness
7
 
16,860

 
56,840

 
298

 
888

 
74,886

Definite weakness-loss unlikely
8
 
58,909

 
37,419

 
2,983

 
1,937

 
101,248

Partial loss probable
9
 
3,490

 
—

 
—

 
—

 
3,490

Definite loss
10
 
—

 
—

 
—

 
—

 
—

Total
 
 
$
1,093,629

 
$
3,251,248

 
$
365,165

 
$
164,676

 
$
4,874,718
Weighted average FICO scores and the weighted average combined LTV ratio The following table shows the weighted average FICO scores and the weighted average combined LTV ratios as of the periods indicated below:
 
March 31,
2019
 
December 31,
2018
Residential portfolio
 
 
 
FICO score (re-scored)(1)
748

 
749

LTV (re-valued)(2)
58.6
%
 
58.6
%
Home equity portfolio
 
 
 
FICO score (re-scored)(1)
767

 
767

LTV (re-valued)(2)(3)
49.6
%
 
49.3
%
 
(1)
The average FICO scores at March 31, 2019 are based upon rescores available from March 11, 2019 and origination score data for loans booked for the remainder of March 2019. The average FICO scores at December 31, 2018 are based upon rescores available from November 2018 and origination score data for loans booked in December 2018.
(2)
The combined LTV ratios for March 31, 2019 are based upon updated automated valuations as of February 2019, when available, or the most current valuation data available. The combined LTV ratios for December 31, 2018 are based upon updated automated valuations as of November 2018, when available, and/or the most current valuation data available. The updated automated valuations provide new information on loans that may be available since the previous valuation was obtained. If no new information is available, the valuation will default to the previously obtained data or most recent appraisal.
(3)
For home equity loans and lines in a subordinate lien, the LTV data represents a combined LTV, taking into account the senior lien data for loans and lines.
Summary of nonaccrual loans The following table shows information regarding nonaccrual loans at the dates indicated:
 
March 31, 2019
 
December 31, 2018
 
(Dollars in thousands)
Commercial and industrial
$
25,879

 
$
26,310

Commercial real estate
1,228

 
3,015

Commercial construction
311

 
311

Small business
180

 
235

Residential real estate
8,517

 
8,251

Home equity
7,202

 
7,278

Other consumer
9

 
13

Total nonaccrual loans (1)
$
43,326

 
$
45,413


(1)Included in these amounts were $28.9 million and $29.3 million of nonaccruing TDRs at March 31, 2019 and December 31, 2018, respectively.
Foreclosed Residential Real Estate Property [Table Text Block] The following table shows information regarding foreclosed residential real estate property at the dates indicated:
 
March 31, 2019
 
December 31, 2018
 
(Dollars in thousands)
Recorded investment in mortgage loans collateralized by residential real estate property that are in the process of foreclosure
$
4,186

 
$
3,174
Age analysis of past due financing receivables The following tables show the age analysis of past due financing receivables as of the dates indicated:
 
March 31, 2019
 
30-59 days
 
60-89 days
 
90 days or more
 
Total Past Due
 
 
 
Total
Financing
Receivables
 
Recorded
Investment
>90 Days
and  Accruing
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Current
 
 
(Dollars in thousands)
Loan Portfolio
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial and industrial
2

 
$
70

 
—

 
$
—

 
4

 
$
413

 
6

 
$
483

 
$
1,150,149

 
$
1,150,632

 
$
—

Commercial real estate
9

 
2,156

 
—

 
—

 
3

 
274

 
12

 
2,430

 
3,251,655

 
3,254,085

 
—

Commercial construction
1

 
387

 
—

 
—

 
1

 
311

 
2

 
698

 
372,819

 
373,517

 
—

Small business
22

 
361

 
23

 
100

 
13

 
104

 
58

 
565

 
165,845

 
166,410

 
—

Residential real estate
12

 
1,467

 
9

 
1,231

 
27

 
4,852

 
48

 
7,550

 
927,688

 
935,238

 
—

Home equity
28

 
1,711

 
8

 
693

 
29

 
3,017

 
65

 
5,421

 
1,075,320

 
1,080,741

 
—

Other consumer (1)
246

 
242

 
13

 
47

 
10

 
10

 
269

 
299

 
15,950

 
16,249

 
5

Total
320

 
$
6,394

 
53

 
$
2,071

 
87

 
$
8,981

 
460

 
$
17,446

 
$
6,959,426

 
$
6,976,872

 
$
5

 
December 31, 2018
 
30-59 days
 
60-89 days
 
90 days or more
 
Total Past Due
 
 
 
Total
Financing
Receivables
 
Recorded
Investment
>90 Days
and Accruing
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Number
of Loans
 
Principal
Balance
 
Current
 
 
(Dollars in thousands)
Loan Portfolio
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial and industrial
—

 
$
—

 
4

 
$
382

 
11

 
$
26,311

 
15

 
$
26,693

 
$
1,066,936

 
$
1,093,629

 
$
—

Commercial real estate
9

 
1,627

 
—

 
—

 
8

 
2,250

 
17

 
3,877

 
3,247,371

 
3,251,248

 
—

Commercial construction
1

 
1,271

 
—

 
—

 
1

 
311

 
2

 
1,582

 
363,583

 
365,165

 
—

Small business
15

 
506

 
19

 
87

 
24

 
162

 
58

 
755

 
163,921

 
164,676

 
—

Residential real estate
23

 
3,486

 
6

 
521

 
25

 
4,382

 
54

 
8,389

 
914,905

 
923,294

 
—

Home equity
22

 
1,331

 
12

 
855

 
29

 
2,663

 
63

 
4,849

 
1,087,235

 
1,092,084

 
—

Other consumer (1)
330

 
181

 
15

 
9

 
12

 
13

 
357

 
203

 
15,895

 
16,098

 
5

Total
400

 
$
8,402

 
56

 
$
1,854

 
110

 
$
36,092

 
566

 
$
46,348

 
$
6,859,846

 
$
6,906,194

 
$
5



(1) Other consumer portfolio is inclusive of deposit account overdrafts recorded as loan balances.
Summary of Troubled Debt Restructuring and other pertinent information The following table shows the Company’s total TDRs and other pertinent information as of the dates indicated:
 
March 31, 2019
 
December 31, 2018
 
(Dollars in thousands)
TDRs on accrual status
$
23,053

 
$
23,849

TDRs on nonaccrual
28,908

 
29,348

Total TDRs
$
51,961

 
$
53,197

Amount of specific reserves included in the allowance for loan losses associated with TDRs
$
1,051

 
$
1,079

Additional commitments to lend to a borrower who has been a party to a TDR
$
865

 
$
982
Change in investment recorded subsequent to modifications The following tables show the modifications which occurred during the periods indicated and the change in the recorded investment subsequent to the modifications occurring:
 
Three Months Ended
 
March 31, 2019
 
Number of
Contracts
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
(Dollars in thousands)
Troubled debt restructurings
 
 
 
 
 
Commercial real estate
1

 
150

 
150

Home equity
1

 
75

 
75

Total
2

 
$
225

 
$
225

 
 
Three Months Ended
 
March 31, 2018
 
Number of
Contracts
 
Pre-Modification
Outstanding
Recorded
Investment
 
Post-Modification
Outstanding
Recorded
Investment
 
(Dollars in thousands)
Troubled debt restructurings
 
 
 
 
 
Commercial real estate
1

 
445

 
445

Home equity
2

 
242

 
242

Total
3

 
$
687

 
$
687

 
Post modification balance of Troubled Debt Restructuring The following table shows the Company’s post-modification balance of TDRs listed by type of modification during the periods indicated:
 
Three Months Ended
 
March 31
 
2019
 
2018
 
(Dollars in thousands)
Adjusted interest rate
$
150

 
$
—

Court ordered concession
75

 
242

Extended maturity
—

 
445

Total
$
225

 
$
687
Impaired loans by loan portfolio The tables below set forth information regarding the Company’s impaired loans by loan portfolio at the dates indicated:
 
March 31, 2019
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
(Dollars in thousands)
With no related allowance recorded
 
 
 
 
 
Commercial and industrial
$
27,724

 
$
37,327

 
$
—

Commercial real estate
8,652

 
8,868

 
—

Commercial construction
311

 
311

 
—

Small business
299

 
347

 
—

Residential real estate
4,402

 
4,574

 
—

Home equity
4,921

 
5,169

 
—

Other consumer
51

 
51

 
—

Subtotal
46,360

 
56,647

 
—

With an allowance recorded
 
 
 
 
 
Commercial and industrial
$
497

 
$
497

 
$
58

Commercial real estate
1,671

 
1,671

 
75

Small business
180

 
220

 
1

Residential real estate
7,659

 
8,669

 
802

Home equity
979

 
1,137

 
161

Other consumer
136

 
138

 
7

Subtotal
11,122

 
12,332

 
1,104

Total
$
57,482

 
$
68,979

 
$
1,104

 
December 31, 2018
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Allowance
 
(Dollars in thousands)
With no related allowance recorded
 
 
 
 
 
Commercial and industrial
$
28,459

 
$
35,913

 
$
—

Commercial real estate
9,552

 
9,832

 
—

Small business
358

 
439

 
—

Residential real estate
4,518

 
4,686

 
—

Home equity
4,957

 
5,199

 
—

Other consumer
56

 
56

 
—

Subtotal
47,900

 
56,125

 
—

With an allowance recorded
 
 
 
 
 
Commercial and industrial
$
370

 
$
370

 
$
7

Commercial real estate
1,287

 
1,287

 
37

Small business
183

 
223

 
1

Residential real estate
8,188

 
9,217

 
862

Home equity
991

 
1,149

 
164

Other consumer
141

 
143

 
8

Subtotal
11,160

 
12,389

 
1,079

Total
$
59,060

 
$
68,514

 
$
1,079
Interest income recognized on impaired loans The following tables set forth information regarding interest income recognized on impaired loans, by portfolio, for the periods indicated:
 
Three Months Ended
 
March 31, 2019
 
Average
Recorded
Investment
 
Interest
Income
Recognized
 
(Dollars in thousands)
With no related allowance recorded
 
 
 
Commercial and industrial
$
30,198

 
$
35

Commercial real estate
8,873

 
104

Commercial construction
311

 
—

Small business
323

 
2

Residential real estate
4,421

 
54

Home equity
4,952

 
55

Other consumer
53

 
1

Subtotal
49,131

 
251

With an allowance recorded
 
 
 
Commercial and industrial
$
498

 
$
3

Commercial real estate
1,682

 
24

Small business
181

 
2

Residential real estate
7,665

 
64

Home equity
985

 
12

Other consumer
138

 
1

Subtotal
11,149

 
106

Total
$
60,280

 
$
357



 
Three Months Ended
 
March 31, 2018
 
Average
Recorded
Investment
 
Interest
Income
Recognized
 
(Dollars in thousands)
With no related allowance recorded
 
 
 
Commercial and industrial
$
33,784

 
$
31

Commercial real estate
14,855

 
157

Small business
710

 
5

Residential real estate
4,254

 
53

Home equity
5,280

 
53

Other consumer
87

 
1

Subtotal
58,970

 
300

With an allowance recorded
 
 
 
Commercial and industrial
$
227

 
$
2

Commercial real estate
1,730

 
24

Small business
131

 
2

Residential real estate
9,060

 
71

Home equity
1,688

 
12

Other consumer
211

 
2

Subtotal
13,047

 
113

Total
$
72,017

 
$
413
Certain Loans Acquired In Transfer Accounted For As Debt Securities Acquired During Period The following table displays certain information pertaining to PCI loans at the dates indicated:
 
March 31, 2019
 
December 31, 2018
 
(Dollars in thousands)
Outstanding balance
$
9,592

 
$
9,749

Carrying amount
$
8,656

 
$
8,795
Certain Loans Acquired in Transfer Accounted for as Debt Securities, Accretable Yield Movement Schedule The following table summarizes activity in the accretable yield for the PCI loan portfolio:
 
Three Months Ended March 31
 
2019
 
2018
 
(Dollars in thousands)
Beginning balance
$
1,191

 
$
1,791

Accretion
(141
)
 
(215
)
Other change in expected cash flows (1)
114

 
44

Reclassification from nonaccretable difference for loans which have paid off (2)
—

 
22

Ending balance
$
1,164

 
$
1,642



(1) Represents changes in cash flows expected to be collected and resulting in increased interest income as a prospective yield adjustment over the remaining life of the loan(s).
(2) Results in increased interest income during the period in which the loan paid off at amount greater than originally expected.