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Loans (Tables)
 3 Months Ended
Mar. 31, 2018
Receivables [Abstract]  
Summary of loans under portfolio
A summary of the Corporation's loans follows:
(Dollars in thousands)
 
Originated
 
Acquired(1)
 
Total Loans
March 31, 2018
 
 
 
 
 
 
Commercial loan portfolio:
 
 
 
 
 
 
Commercial
 
$
2,486,533

 
$
940,752

 
$
3,427,285

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
1,185,797

 
647,027

 
1,832,824

Non-owner occupied
 
1,689,022

 
991,779

 
2,680,801

Vacant land
 
43,984

 
30,767

 
74,751

Total commercial real estate
 
2,918,803

 
1,669,573

 
4,588,376

Real estate construction and land development
 
485,474

 
74,306

 
559,780

Subtotal
 
5,890,810

 
2,684,631

 
8,575,441

Consumer loan portfolio:
 
 
 
 
 
 
Residential mortgage
 
2,039,349

 
1,225,271

 
3,264,620

Consumer installment
 
1,478,673

 
93,567

 
1,572,240

Home equity
 
603,684

 
202,762

 
806,446

Subtotal
 
4,121,706

 
1,521,600

 
5,643,306

Total loans(2)
 
$
10,012,516

 
$
4,206,231

 
$
14,218,747

December 31, 2017
 
 
 
 
 
 
Commercial loan portfolio:
 
 
 
 
 
 
Commercial
 
$
2,407,606

 
$
978,036

 
$
3,385,642

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
1,185,614

 
627,948

 
1,813,562

Non-owner occupied
 
1,518,787

 
1,087,974

 
2,606,761

Vacant land
 
47,024

 
33,323

 
80,347

Total commercial real estate
 
2,751,425

 
1,749,245

 
4,500,670

Real estate construction and land development
 
498,155

 
76,060

 
574,215

Subtotal
 
5,657,186

 
2,803,341

 
8,460,527

Consumer loan portfolio:
 
 
 
 
 
 
Residential mortgage
 
1,967,857

 
1,284,630

 
3,252,487

Consumer installment
 
1,510,540

 
102,468

 
1,613,008

Home equity
 
611,846

 
217,399

 
829,245

Subtotal
 
4,090,243

 
1,604,497

 
5,694,740

Total loans(2)
 
$
9,747,429

 
$
4,407,838

 
$
14,155,267


(1) 
Acquired loans are accounted for under ASC Topic 310-30, Loans and Debt Securities Acquired with Deteriorated Credit Quality (ASC 310-30)
(2) 
Reported net of deferred costs totaling $23.9 million and $26.1 million at March 31, 2018 and December 31, 2017, respectively.
Schedule of activity for accretable yield
Activity for the accretable yield, which includes contractually due interest for acquired loans that have been renewed or extended since the date of acquisition and continue to be accounted for in loan pools in accordance with ASC 310-30, follows:
(Dollars in thousands)
 
Talmer
 
Lake Michigan
 
Monarch
 
North-western
 
OAK
 
Total
Three Months Ended March 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
 
$
731,353

 
$
95,124

 
$
22,496

 
$
60,814

 
$
17,110

 
$
926,897

Accretion recognized in interest income
 
(42,640
)
 
(6,758
)
 
(1,156
)
 
(4,904
)
 
(3,103
)
 
(58,561
)
Net reclassification (to) from nonaccretable difference(1)
 
(2,883
)
 
1,790

 
(186
)
 
(510
)
 
2,151

 
362

Balance at end of period
 
$
685,830

 
$
90,156

 
$
21,154

 
$
55,400

 
$
16,158

 
$
868,698

 
 
 
 
 
 
 
 
 
 
 
 
 
Three Months Ended March 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
Balance at beginning of period
 
$
798,210

 
$
121,416

 
$
27,182

 
$
69,847

 
$
23,316

 
$
1,039,971

Accretion recognized in interest income
 
(44,571
)
 
(7,266
)
 
(1,181
)
 
(3,892
)
 
(3,277
)
 
(60,187
)
Net reclassification (to) from nonaccretable difference(1)
 
21,139

 
(939
)
 
54

 
(1,058
)
 
1,428

 
20,624

Balance at end of period
 
$
774,778

 
$
113,211

 
$
26,055

 
$
64,897

 
$
21,467

 
$
1,000,408


(1) 
The net reclassification results from changes in expected cash flows of the acquired loans which may include increases in the amount of contractual principal and interest expected to be collected due to improvement in credit quality, increases in balances outstanding from advances, renewals, extensions and interest rates; as well as reductions in contractual principal and interest expected to be collected due to credit deterioration, payoffs, and decreases in interest rates.
Recorded investment of loans in the commercial loan portfolio by risk rating categories
The following schedule presents the recorded investment of loans in the commercial loan portfolio by credit risk categories at March 31, 2018 and December 31, 2017:
(Dollars in thousands)
 
Pass
 
Special Mention
 
Substandard
 
Doubtful
 
Total
March 31, 2018
 
 
 
 
 
 
 
 
 
 
Originated Portfolio:
 
 
 
 
 
 
 
 
 
 
Commercial
 
$
2,401,859

 
$
37,084

 
$
47,590

 
$
—

 
$
2,486,533

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
1,123,847

 
16,850

 
44,789

 
311

 
1,185,797

Non-owner occupied
 
1,652,313

 
33,895

 
2,813

 
1

 
1,689,022

Vacant land
 
37,179

 
53

 
6,752

 
—

 
43,984

Total commercial real estate
 
2,813,339

 
50,798

 
54,354

 
312

 
2,918,803

Real estate construction and land development
 
472,340

 
9,724

 
3,410

 
—

 
485,474

Subtotal
 
5,687,538

 
97,606

 
105,354

 
312

 
5,890,810

Acquired Portfolio:
 
 
 
 
 
 
 
 
 
 
Commercial
 
830,615

 
66,480

 
43,471

 
186

 
940,752

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
583,937

 
26,683

 
36,022

 
385

 
647,027

Non-owner occupied
 
913,327

 
45,146

 
33,306

 
—

 
991,779

Vacant land
 
25,632

 
312

 
4,823

 
—

 
30,767

Total commercial real estate
 
1,522,896

 
72,141

 
74,151

 
385

 
1,669,573

Real estate construction and land development
 
71,736

 
1,611

 
959

 
—

 
74,306

Subtotal
 
2,425,247

 
140,232

 
118,581

 
571

 
2,684,631

Total
 
$
8,112,785

 
$
237,838

 
$
223,935

 
$
883

 
$
8,575,441

December 31, 2017
 
 
 
 
 
 
 
 
 
 
Originated Portfolio:
 
 
 
 
 
 
 
 
 
 
Commercial
 
$
2,316,464

 
$
41,059

 
$
50,083

 
$
—

 
$
2,407,606

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
1,133,609

 
19,438

 
32,567

 
—

 
1,185,614

Non-owner occupied
 
1,504,195

 
4,728

 
9,864

 
—

 
1,518,787

Vacant land
 
39,775

 
38

 
7,211

 
—

 
47,024

Total commercial real estate
 
2,677,579

 
24,204

 
49,642

 
—

 
2,751,425

Real estate construction and land development
 
494,528

 
837

 
2,790

 
—

 
498,155

Subtotal
 
5,488,571

 
66,100

 
102,515

 
—

 
5,657,186

Acquired Portfolio:
 
 
 
 
 
 
 
 
 
 
Commercial
 
873,861

 
68,418

 
35,539

 
218

 
978,036

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
580,127

 
23,998

 
23,036

 
787

 
627,948

Non-owner occupied
 
995,709

 
43,645

 
48,620

 
—

 
1,087,974

Vacant land
 
27,849

 
327

 
5,147

 
—

 
33,323

Total commercial real estate
 
1,603,685

 
67,970

 
76,803

 
787

 
1,749,245

Real estate construction and land development
 
72,346

 
2,218

 
1,496

 
—

 
76,060

Subtotal
 
2,549,892

 
138,606

 
113,838

 
1,005

 
2,803,341

Total
 
$
8,038,463

 
$
204,706

 
$
216,353

 
$
1,005

 
$
8,460,527
Recorded investment of loans in the consumer loan portfolio based on the credit risk profile of loans in a performing and nonperforming status
The following schedule presents the recorded investment of loans in the consumer loan portfolio based on loans in a performing status and loans in a nonperforming status at March 31, 2018 and December 31, 2017:
(Dollars in thousands)
 
Residential Mortgage
 
Consumer
Installment
 
Home Equity
 
Total
Consumer
March 31, 2018
 
 
 
 
 
 
 
 
Originated Loans:
 
 
 
 
 
 
 
 
Performing
 
$
2,031,728

 
$
1,477,751

 
$
600,645

 
$
4,110,124

Nonperforming
 
7,621

 
922

 
3,039

 
11,582

Subtotal
 
2,039,349

 
1,478,673

 
603,684

 
4,121,706

Acquired Loans
 
1,225,271

 
93,567

 
202,762

 
1,521,600

Total
 
$
3,264,620

 
$
1,572,240

 
$
806,446

 
$
5,643,306

December 31, 2017
 
 
 
 
 
 
 
 
Originated Loans:
 
 
 
 
 
 
 
 
Performing
 
$
1,959,222

 
$
1,509,698

 
$
607,541

 
$
4,076,461

Nonperforming
 
8,635

 
842

 
4,305

 
13,782

Subtotal
 
1,967,857

 
1,510,540

 
611,846

 
4,090,243

Acquired Loans
 
1,284,630

 
102,468

 
217,399

 
1,604,497

Total
 
$
3,252,487

 
$
1,613,008

 
$
829,245

 
$
5,694,740
Summary of nonperforming loans
A summary of nonperforming loans follows:
(Dollars in thousands)
 
March 31,
2018
 
December 31,
2017
Nonperforming assets
 
 
 
 
Nonaccrual loans:
 
 
 
 
Commercial
 
$
20,000

 
$
19,691

Commercial real estate:
 
 
 
 
Owner-occupied
 
19,855

 
19,070

Non-owner occupied
 
5,489

 
5,270

Vacant land
 
4,829

 
5,205

Total commercial real estate
 
30,173

 
29,545

Real estate construction and land development
 
77

 
77

Residential mortgage
 
7,621

 
8,635

Consumer installment
 
922

 
842

Home equity
 
3,039

 
4,305

Total nonaccrual loans
 
61,832

 
63,095

Other real estate owned and repossessed assets
 
7,719

 
8,807

Total nonperforming assets
 
$
69,551

 
$
71,902

Accruing loans contractually past due 90 days or more as to interest or principal payments, excluding acquired loans accounted for under ASC 310-30
 
 
 
 
Commercial
 
$
322

 
$
—

Commercial real estate:
 
 
 
 
Non-owner occupied
 
—

 
13

Total commercial real estate
 
—

 
13

Home equity
 
913

 
1,364

Total accruing loans contractually past due 90 days or more as to interest or principal payments, excluding acquired loans accounted for under ASC 310-30
 
$
1,235

 
$
1,377
Schedule representing the aging status of the recorded investment in loans by classes
Loan delinquency, excluding acquired loans accounted for under ASC 310-30, was as follows:
(Dollars in thousands)
 
30-59
days
past due
 
60-89
days
past due
 
90 days or more past due
 
Total past due
 
Current
 
Total loans
 
90 days or more past due and still accruing
March 31, 2018
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Originated Portfolio:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial
 
$
8,689

 
$
6,079

 
$
12,122

 
$
26,890

 
$
2,459,643

 
$
2,486,533

 
$
322

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
10,829

 
3,368

 
8,394

 
22,591

 
1,163,206

 
1,185,797

 
—

Non-owner occupied
 
3,749

 
897

 
928

 
5,574

 
1,683,448

 
1,689,022

 
—

Vacant land
 
675

 
—

 
180

 
855

 
43,129

 
43,984

 
—

Total commercial real estate
 
15,253

 
4,265

 
9,502

 
29,020

 
2,889,783

 
2,918,803

 
—

Real estate construction and land development
 
100

 
—

 
—

 
100

 
485,374

 
485,474

 
—

Residential mortgage
 
3,020

 
246

 
2,276

 
5,542

 
2,033,807

 
2,039,349

 
—

Consumer installment
 
2,817

 
570

 
257

 
3,644

 
1,475,029

 
1,478,673

 
—

Home equity
 
3,631

 
1,360

 
2,049

 
7,040

 
596,644

 
603,684

 
913

Total
 
$
33,510

 
$
12,520

 
$
26,206

 
$
72,236

 
$
9,940,280

 
$
10,012,516

 
$
1,235

December 31, 2017
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Originated Portfolio:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial
 
$
13,906

 
$
3,766

 
$
9,494

 
$
27,166

 
$
2,380,440

 
$
2,407,606

 
$
—

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Owner-occupied
 
7,644

 
1,306

 
5,027

 
13,977

 
1,171,637

 
1,185,614

 
—

Non-owner occupied
 
1,653

 
228

 
693

 
2,574

 
1,516,213

 
1,518,787

 
13

Vacant land
 
83

 
28

 
153

 
264

 
46,760

 
47,024

 
—

Total commercial real estate
 
9,380

 
1,562

 
5,873

 
16,815

 
2,734,610

 
2,751,425

 
13

Real estate construction and land development
 
—

 
—

 
—

 
—

 
498,155

 
498,155

 
—

Residential mortgage
 
2,795

 
1,415

 
858

 
5,068

 
1,962,789

 
1,967,857

 
—

Consumer installment
 
3,324

 
442

 
226

 
3,992

 
1,506,548

 
1,510,540

 
—

Home equity
 
2,319

 
1,301

 
2,196

 
5,816

 
606,030

 
611,846

 
1,364

Total
 
$
31,724

 
$
8,486

 
$
18,647

 
$
58,857

 
$
9,688,572

 
$
9,747,429

 
$
1,377
Schedule of Impaired loans by classes
The following schedules present impaired loans by classes of loans at March 31, 2018 and December 31, 2017:
(Dollars in thousands)
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Valuation
Allowance
March 31, 2018
 
 
 
 
 
 
Impaired loans with a valuation allowance:
 
 
 
 
 
 
Commercial
 
$
23,500

 
$
25,998

 
$
1,987

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
15,177

 
19,266

 
2,510

Non-owner occupied
 
2,952

 
5,545

 
201

Vacant land
 
1,317

 
1,520

 
356

Total commercial real estate
 
19,446

 
26,331

 
3,067

Real estate construction and land development
 
164

 
164

 
26

Residential mortgage
 
13,434

 
13,434

 
1,422

Consumer installment
 
1,101

 
1,101

 
206

Home equity
 
3,409

 
3,409

 
286

Subtotal
 
61,054

 
70,437

 
6,994

Impaired loans with no related valuation allowance:
 
 
 
 
 
 
Commercial
 
14,771

 
15,637

 
—

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
15,435

 
16,291

 
—

Non-owner occupied
 
8,122

 
9,135

 
—

Vacant land
 
3,854

 
4,652

 
—

Total commercial real estate
 
27,411

 
30,078

 
—

Real estate construction and land development
 
174

 
241

 
—

Residential mortgage
 
5,928

 
5,928

 
—

Consumer installment
 
—

 
—

 
—

Home equity
 
1,780

 
1,780

 
—

Subtotal
 
50,064

 
53,664

 
—

Total impaired loans:
 
 
 
 
 
 
Commercial
 
38,271

 
41,635

 
1,987

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
30,612

 
35,557

 
2,510

Non-owner occupied
 
11,074

 
14,680

 
201

Vacant land
 
5,171

 
6,172

 
356

Total commercial real estate
 
46,857

 
56,409

 
3,067

Real estate construction and land development
 
338

 
405

 
26

Residential mortgage
 
19,362

 
19,362

 
1,422

Consumer installment
 
1,101

 
1,101

 
206

Home equity
 
5,189

 
5,189

 
286

Total
 
$
111,118

 
$
124,101

 
$
6,994

(Dollars in thousands)
 
Recorded
Investment
 
Unpaid
Principal
Balance
 
Related
Valuation
Allowance
December 31, 2017
 
 
 
 
 
 
Impaired loans with a valuation allowance:
 
 
 
 
 
 
Commercial
 
$
28,897

 
$
31,655

 
$
2,296

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
17,774

 
21,588

 
2,317

Non-owner occupied
 
5,307

 
7,870

 
316

Vacant land
 
4,922

 
5,122

 
594

Total commercial real estate
 
28,003

 
34,580

 
3,227

Real estate construction and land development
 
313

 
313

 
14

Residential mortgage
 
15,872

 
15,872

 
1,487

Consumer installment
 
966

 
966

 
120

Home equity
 
4,570

 
4,570

 
858

Subtotal
 
78,621

 
87,956

 
8,002

Impaired loans with no related valuation allowance:
 
 
 
 
 
 
Commercial
 
8,504

 
9,291

 
—

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
11,351

 
12,631

 
—

Non-owner occupied
 
5,977

 
6,438

 
—

Vacant land
 
752

 
792

 
—

Total commercial real estate
 
18,080

 
19,861

 
—

Residential mortgage
 
4,902

 
4,902

 
—

Home equity
 
1,770

 
1,770

 
—

Subtotal
 
33,256

 
35,824

 
—

Total impaired loans:
 
 
 
 
 
 
Commercial
 
37,401

 
40,946

 
2,296

Commercial real estate:
 
 
 
 
 
 
Owner-occupied
 
29,125

 
34,219

 
2,317

Non-owner occupied
 
11,284

 
14,308

 
316

Vacant land
 
5,674

 
5,914

 
594

Total commercial real estate
 
46,083

 
54,441

 
3,227

Real estate construction and land development
 
313

 
313

 
14

Residential mortgage
 
20,774

 
20,774

 
1,487

Consumer installment
 
966

 
966

 
120

Home equity
 
6,340

 
6,340

 
858

Total
 
$
111,877

 
$
123,780

 
$
8,002
Schedule presents information related to impaired loans
The following schedule presents additional information regarding impaired loans by classes of loans segregated by those requiring a valuation allowance and those not requiring a valuation allowance for the three months ended March 31, 2018 and 2017, and the respective interest income amounts recognized:
 
 
Three Months Ended March 31, 2018
 
Three Months Ended March 31, 2017
(Dollars in thousands)
 
Average
recorded
investment
 
Interest income
recognized
while on
impaired status
 
Average
recorded
investment
 
Interest income
recognized
while on
impaired status
Impaired loans with a valuation allowance:
 
 
 
 
 
 
 
 
Commercial
 
$
20,402

 
$
165

 
$
25,712

 
$
224

Commercial real estate:
 
 
 
 
 
 
 
 
Owner-occupied
 
14,072

 
82

 
14,659

 
154

Non-owner occupied
 
3,870

 
11

 
3,388

 
24

Vacant land
 
3,695

 
15

 
1,988

 
25

Total commercial real estate
 
21,637

 
108

 
20,035

 
203

Real estate construction and land development
 
225

 
2

 
161

 
2

Residential mortgage
 
13,604

 
117

 
17,398

 
155

Consumer installment
 
906

 
1

 
780

 
1

Home equity
 
3,694

 
17

 
4,071

 
21

Subtotal
 
$
60,468

 
$
410

 
$
68,157

 
$
606

Impaired loans with no related valuation allowance:
 
 
 
 
 
 
 
 
Commercial
 
$
18,126

 
$
95

 
$
9,297

 
$
30

Commercial real estate:
 
 
 
 
 
 
 
 
Owner-occupied
 
15,369

 
56

 
9,866

 
6

Non-owner occupied
 
7,158

 
65

 
9,131

 
85

Vacant land
 
1,769

 
—

 
4,476

 
12

Total commercial real estate
 
24,296

 
121

 
23,473

 
103

Real estate construction and land development
 
107

 
1

 
81

 
—

Residential mortgage
 
6,138

 
23

 
3,808

 
8

Consumer installment
 
140

 
—

 
215

 
—

Home equity
 
2,046

 
7

 
880

 
1

Subtotal
 
$
50,853


$
247


$
37,754


$
142

Total impaired loans:
 
 
 
 
 
 
 
 
Commercial
 
$
38,528

 
$
260

 
$
35,009

 
$
254

Commercial real estate:
 
 
 
 
 
 
 
 
Owner-occupied
 
29,441

 
138

 
24,525

 
160

Non-owner occupied
 
11,028

 
76

 
12,519

 
109

Vacant land
 
5,464

 
15

 
6,464

 
37

Total commercial real estate
 
45,933

 
229

 
43,508

 
306

Real estate construction and land development
 
332

 
3

 
242

 
2

Residential mortgage
 
19,742

 
140

 
21,206

 
163

Consumer installment
 
1,046

 
1

 
995

 
1

Home equity
 
5,740

 
24

 
4,951

 
22

Total
 
$
111,321

 
$
657

 
$
105,911


$
748
Schedule providing information on TDRs
The following schedule presents the Corporation's TDRs at March 31, 2018 and December 31, 2017:
(Dollars in thousands)
 
Accruing TDRs
 
Nonaccrual TDRs
 
Total
March 31, 2018
 
 
 
 
 
 
Commercial loan portfolio
 
$
35,216

 
$
21,914

 
$
57,130

Consumer loan portfolio
 
14,070

 
4,265

 
18,335

Total
 
$
49,286

 
$
26,179

 
$
75,465

December 31, 2017
 
 
 
 
 
 
Commercial loan portfolio
 
$
34,484

 
$
24,358

 
$
58,842

Consumer loan portfolio
 
14,298

 
4,748

 
19,046

Total
 
$
48,782

 
$
29,106

 
$
77,888



The following tables present the recorded investment of loans modified into TDRs during the three months ended March 31, 2018 and 2017 by type of concession granted. In cases where more than one type of concession was granted, the loans were categorized based on the most significant concession.
 
Concession type
 
 
 
 
 
 
(Dollars in thousands)
Principal
deferral
 
Principal
reduction
 
Interest
rate
 
Forbearance
agreement
 
Total
number
of loans
 
Pre-modification recorded investment
 
Post-modification recorded investment
For the three months ended March 31, 2018
 
 
 
 
 
 
 
 
 
 
Commercial loan portfolio:
 
 
 
 
 
 
 
 
 
 
 
 
Commercial
$
903

 
$
—

 
$
1,065

 
$
261

 
18

 
$
2,235

 
$
2,229

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
 
 
 
Owner-occupied
—

 
—

 
726

 
482

 
2

 
1,208

 
1,208

Non-owner occupied
68

 
—

 
—

 
—

 
1

 
74

 
68

Total commercial real estate
68

 
—

 
726

 
482

 
3

 
1,282

 
1,276

Total Commercial
971

 
—

 
1,791

 
743

 
21

 
3,517

 
3,505

Consumer loan portfolio:
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage
138

 
—

 
—

 
—

 
4

 
142

 
138

Consumer installment
71

 
23

 
28

 
—

 
16

 
128

 
122

Home equity
185

 
—

 
28

 
—

 
5

 
253

 
213

Total Consumer
394

 
23

 
56

 
—

 
25

 
523

 
473

Total loans
$
1,365

 
$
23

 
$
1,847

 
$
743

 
46

 
$
4,040

 
$
3,978

 
Concession type
 
 
 
 
 
 
(Dollars in thousands)
Principal
deferral
 
Interest
rate
 
Forbearance
agreement
 
Total
number
of loans
 
Pre-modification recorded investment
 
Post-modification recorded investment
For the three months ended March 31, 2017
 
 
 
 
 
 
 
 
 
 
Commercial loan portfolio:
 
 
 
 
 
 
 
 
 
 
Commercial
$
50

 
$
1,101

 
$
579

 
5

 
$
1,739

 
$
1,730

Commercial real estate:
 
 
 
 
 
 
 
 
 
 
 
Owner-occupied
447

 
75

 
—

 
3

 
522

 
522

Total commercial real estate
447

 
75

 
—

 
3

 
522

 
522

Total Commercial
497

 
1,176

 
579

 
8

 
2,261

 
2,252

Consumer loan portfolio:
 
 
 
 
 
 
 
 
 
 
Residential mortgage
98

 
—

 
—

 
1

 
98

 
98

Consumer installment
10

 
—

 
—

 
2

 
11

 
10

Home equity
111

 
—

 
—

 
1

 
165

 
111

Total Consumer
219

 
—

 
—

 
4

 
274

 
219

Total loans
$
716

 
$
1,176

 
$
579

 
12

 
$
2,535

 
$
2,471
Troubled debt restructurings on financing receivables with defaults payment
The following schedule includes TDRs for which there was a payment default during the three months ended March 31, 2018 and 2017, whereby the borrower was past due with respect to principal and/or interest for 90 days or more, and the loan became a TDR during the twelve-month period prior to the default:
 
 
For The Three Months Ended March 31, 2018
(Dollars in thousands)
 
Number of loans
 
Principal balance
Commercial loan portfolio (commercial)
 
1

 
$
82

Consumer loan portfolio (residential mortgage)
 
1

 
3

Total
 
2

 
$
85

 
 
 
 
 
 
 
For The Three Months Ended March 31, 2017
(Dollars in thousands)
 
Number of loans
 
Principal balance
Commercial loan portfolio (commercial)
 
3

 
$
620

Consumer loan portfolio (residential mortgage)
 
2

 
105

Total
 
5

 
$
725
Schedule of allowance and recorded investment related to financing receivables segregated by portfolio segment
The following schedule presents, by loan portfolio segment, the changes in the allowance for the originated loan portfolio for the three months ended March 31, 2018 and 2017.
(Dollars in thousands)
 
Commercial
Loan
Portfolio
 
Consumer
Loan
Portfolio
 
Total
Originated Loan Portfolio
 
 
 
 
 
 
Changes in allowance for loan losses for the three months ended March 31, 2018:
Beginning balance
 
$
66,133

 
$
25,754

 
$
91,887

Provision for loan losses
 
3,400

 
2,856

 
6,256

Charge-offs
 
(2,594
)
 
(2,230
)
 
(4,824
)
Recoveries
 
805

 
638

 
1,443

Ending balance
 
$
67,744

 
$
27,018

 
$
94,762

Changes in allowance for loan losses for the three months ended March 31, 2017:
Beginning balance
 
$
51,201

 
$
27,067

 
$
78,268

Provision for loan losses
 
4,392

 
(342
)
 
4,050

Charge-offs
 
(2,691
)
 
(2,883
)
 
(5,574
)
Recoveries
 
1,413

 
617

 
2,030

Ending balance
 
$
54,315

 
$
24,459

 
$
78,774

    
The following schedule presents by loan portfolio segment, details regarding the balance in the allowance and the recorded investment in loans at March 31, 2018 and December 31, 2017 by impairment evaluation method.
(Dollars in thousands)
 
Commercial
Loan
Portfolio
 
Consumer
Loan
Portfolio
 
Total
Allowance for loan losses balance at March 31, 2018 attributable to:
Loans individually evaluated for impairment
 
$
5,080

 
$
1,914

 
$
6,994

Loans collectively evaluated for impairment
 
62,664

 
25,104

 
87,768

Loans acquired with deteriorated credit quality
 
—

 
—

 
—

Total
 
$
67,744

 
$
27,018

 
$
94,762

Recorded investment (loan balance) at March 31, 2018:
Loans individually evaluated for impairment
 
$
85,466

 
$
25,652

 
$
111,118

Loans collectively evaluated for impairment
 
5,805,344

 
4,096,054

 
9,901,398

Loans acquired with deteriorated credit quality
 
2,684,631

 
1,521,600

 
4,206,231

Total
 
$
8,575,441

 
$
5,643,306

 
$
14,218,747

(Dollars in thousands)
 
Commercial
Loan
Portfolio
 
Consumer
Loan
Portfolio
 
Total
Allowance for loan losses balance at December 31, 2017 attributable to:
 
 
Loans individually evaluated for impairment
 
$
5,537

 
$
2,465

 
$
8,002

Loans collectively evaluated for impairment
 
60,596

 
23,289

 
83,885

Loans acquired with deteriorated credit quality
 
—

 
—

 
—

Total
 
$
66,133

 
$
25,754

 
$
91,887

Recorded investment (loan balance) at December 31, 2017:
 
 
Loans individually evaluated for impairment
 
$
83,797

 
$
28,080

 
$
111,877

Loans collectively evaluated for impairment
 
5,573,389

 
4,062,163

 
9,635,552

Loans acquired with deteriorated credit quality
 
2,803,341

 
1,604,497

 
4,407,838

Total
 
$
8,460,527

 
$
5,694,740

 
$
14,155,267