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Loans and Allowances for Credit Losses (Tables)
 6 Months Ended
Jun. 30, 2019
Loans and Leases Receivable, Net Amount [Abstract]  
Schedule of Loans by Portfolio Segment [Table Text Block]
Portfolio segments of the loan portfolio are as follows (in thousands):

 
 
June 30, 2019
 
December 31, 2018
 
 
Fixed
Rate
 
Variable
Rate
 
Non-accrual
 
Total
 
Fixed
Rate
 
Variable
Rate
 
Non-accrual
 
Total
Commercial
 
$
3,264,990

 
$
10,948,523

 
$
123,395

 
$
14,336,908

 
$
2,251,188

 
$
11,285,049

 
$
99,841

 
$
13,636,078

Commercial real estate
 
1,008,236

 
3,680,127

 
21,670

 
4,710,033

 
1,477,274

 
3,265,918

 
21,621

 
4,764,813

Residential mortgage
 
1,751,803

 
380,542

 
38,477

 
2,170,822

 
1,830,224

 
358,254

 
41,555

 
2,230,033

Personal
 
181,855

 
855,797

 
237

 
1,037,889

 
190,687

 
834,889

 
230

 
1,025,806

Total
 
$
6,206,884

 
$
15,864,989

 
$
183,779

 
$
22,255,652

 
$
5,749,373

 
$
15,744,110

 
$
163,247

 
$
21,656,730

Accruing loans past due (90 days)1
 
 

 
 

 
 

 
$
2,698

 
 

 
 

 
 

 
$
1,338

1 
Excludes residential mortgage loans guaranteed by agencies of the U.S. government
 
 
 
 
 
 
 
 
 
Rollforward of Allowance For Loan Losses And Accrual for Off-Balance Sheet Credit Losses [Table Text Block]
The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended June 30, 2019 is summarized as follows (in thousands):
 
 
Commercial
 
Commercial Real Estate
 
Residential Mortgage
 
Personal
 
Nonspecific Allowance
 
Total
Allowance for loan losses:
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
103,577

 
$
58,134

 
$
15,668

 
$
8,783

 
$
19,178

 
$
205,340

Provision for loan losses
 
13,771

 
(8,173
)
 
1

 
1,660

 
(2,341
)
 
4,918

Loans charged off
 
(11,385
)
 
(118
)
 
(94
)
 
(1,630
)
 
—

 
(13,227
)
Recoveries
 
434

 
4,345

 
149

 
575

 
—

 
5,503

Ending balance
 
$
106,397

 
$
54,188

 
$
15,724

 
$
9,388

 
$
16,837

 
$
202,534

Allowance for off-balance sheet credit losses:
 
 

 
 

 
 

 
 

 
 

 
 

Beginning balance
 
$
1,725

 
$
48

 
$
47

 
$
1

 
$
—

 
$
1,821

Provision for off-balance sheet credit losses
 
17

 
68

 
(3
)
 
—

 
—

 
82

Ending balance
 
$
1,742

 
$
116

 
$
44

 
$
1

 
$
—

 
$
1,903

 
 
 
 
 
 
 
 
 
 
 
 
 
Total provision for credit losses
 
$
13,788

 
$
(8,105
)
 
$
(2
)
 
$
1,660

 
$
(2,341
)
 
$
5,000



The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the six months ended June 30, 2019 is summarized as follows (in thousands):
 
 
Commercial
 
Commercial Real Estate
 
Residential Mortgage
 
Personal
 
Nonspecific Allowance
 
Total
Allowance for loan losses:
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
102,226

 
$
60,026

 
$
17,964

 
$
9,473

 
$
17,768

 
$
207,457

Provision for loan losses
 
24,879

 
(10,177
)
 
(2,407
)
 
1,523

 
(931
)
 
12,887

Loans charged off
 
(21,853
)
 
(118
)
 
(136
)
 
(2,895
)
 
—

 
(25,002
)
Recoveries
 
1,145

 
4,457

 
303

 
1,287

 
—

 
7,192

Ending balance
 
$
106,397

 
$
54,188

 
$
15,724

 
$
9,388

 
$
16,837

 
$
202,534

Allowance for off-balance sheet credit losses:
 
 

 
 

 
 

 
 

 
 

 
 

Beginning balance
 
$
1,655

 
$
52

 
$
52

 
$
31

 
$
—

 
$
1,790

Provision for off-balance sheet credit losses
 
87

 
64

 
(8
)
 
(30
)
 
—

 
113

Ending balance
 
$
1,742

 
$
116

 
$
44

 
$
1

 
$
—

 
$
1,903

 
 
 
 
 
 
 
 
 
 
 
 
 
Total provision for credit losses
 
$
24,966

 
$
(10,113
)
 
$
(2,415
)
 
$
1,493

 
$
(931
)
 
$
13,000


The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the three months ended June 30, 2018 is summarized as follows (in thousands):
 
 
Commercial
 
Commercial Real Estate
 
Residential Mortgage
 
Personal
 
Nonspecific Allowance
 
Total
Allowance for loan losses:
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
120,083

 
$
57,070

 
$
18,431

 
$
8,408

 
$
19,975

 
$
223,967

Provision for loan losses
 
7,116

 
(1,409
)
 
(257
)
 
755

 
(4,503
)
 
1,702

Loans charged off
 
(13,775
)
 
—

 
(135
)
 
(1,195
)
 
—

 
(15,105
)
Recoveries
 
298

 
3,097

 
505

 
678

 
—

 
4,578

Ending balance
 
$
113,722

 
$
58,758

 
$
18,544

 
$
8,646

 
$
15,472

 
$
215,142

Allowance for off-balance sheet credit losses:
 
 

 
 

 
 

 
 

 
 

 
 

Beginning balance
 
4,027

 
44

 
62

 
2

 
—

 
$
4,135

Provision for off-balance sheet credit losses
 
(1,666
)
 
(27
)
 
(9
)
 
—

 
—

 
(1,702
)
Ending balance
 
$
2,361

 
$
17

 
$
53

 
$
2

 
$
—

 
$
2,433

 
 
 
 
 
 
 
 
 
 
 
 
 
Total provision for credit losses
 
$
5,450

 
$
(1,436
)
 
$
(266
)
 
$
755

 
$
(4,503
)
 
$
—



The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit for the six months ended June 30, 2018 is summarized as follows (in thousands):
 
 
Commercial
 
Commercial Real Estate
 
Residential Mortgage
 
Personal
 
Nonspecific Allowance
 
Total
Allowance for loan losses:
 
 
 
 
 
 
 
 
 
 
 
 
Beginning balance
 
$
124,269

 
$
56,621

 
$
18,451

 
$
9,124

 
$
22,217

 
$
230,682

Provision for loan losses
 
4,005

 
(1,143
)
 
(419
)
 
603

 
(6,745
)
 
(3,699
)
Loans charged off
 
(15,338
)
 
—

 
(235
)
 
(2,422
)
 
—

 
(17,995
)
Recoveries
 
786

 
3,280

 
747

 
1,341

 
—

 
6,154

Ending balance
 
$
113,722

 
$
58,758

 
$
18,544

 
$
8,646

 
$
15,472

 
$
215,142

Allowance for off-balance sheet credit losses:
 
 

 
 

 
 

 
 

 
 

 
 

Beginning balance
 
$
3,644

 
$
45

 
$
43

 
$
2

 
$
—

 
$
3,734

Provision for off-balance sheet credit losses
 
(1,283
)
 
(28
)
 
10

 
—

 
—

 
(1,301
)
Ending balance
 
$
2,361

 
$
17

 
$
53

 
$
2

 
$
—

 
$
2,433

 
 
 
 
 
 
 
 
 
 
 
 
 
Total provision for credit losses
 
$
2,722

 
$
(1,171
)
 
$
(409
)
 
$
603

 
$
(6,745
)
 
$
(5,000
)

The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at June 30, 2019 is as follows (in thousands):
 
 
Collectively Measured
for Impairment
 
Individually Measured
for Impairment
 
Total
 
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related
Allowance
Commercial
 
$
14,213,513

 
$
102,359

 
$
123,395

 
$
4,038

 
$
14,336,908

 
$
106,397

Commercial real estate
 
4,688,363

 
54,188

 
21,670

 
—

 
4,710,033

 
54,188

Residential mortgage
 
2,132,345

 
15,724

 
38,477

 
—

 
2,170,822

 
15,724

Personal
 
1,037,652

 
9,388

 
237

 
—

 
1,037,889

 
9,388

Total
 
22,071,873

 
181,659

 
183,779

 
4,038

 
22,255,652

 
185,697

 
 
 
 
 
 
 
 
 
 
 
 
 
Nonspecific allowance
 
—

 
—

 
—

 
—

 
—

 
16,837

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
22,071,873

 
$
181,659

 
$
183,779

 
$
4,038

 
$
22,255,652

 
$
202,534


The allowance for loan losses and recorded investment of the related loans by portfolio segment for each impairment measurement method at December 31, 2018 is as follows (in thousands):
 
 
Collectively Measured
for Impairment
 
Individually Measured
for Impairment
 
Total
 
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related
Allowance
Commercial
 
$
13,536,237

 
$
93,494

 
$
99,841

 
$
8,732

 
$
13,636,078

 
$
102,226

Commercial real estate
 
4,743,192

 
60,026

 
21,621

 
—

 
4,764,813

 
60,026

Residential mortgage
 
2,188,478

 
17,964

 
41,555

 
—

 
2,230,033

 
17,964

Personal
 
1,025,576

 
9,473

 
230

 
—

 
1,025,806

 
9,473

Total
 
21,493,483

 
180,957

 
163,247

 
8,732

 
21,656,730

 
189,689

 
 
 
 
 
 
 
 
 
 
 
 
 
Nonspecific allowance
 
—

 
—

 
—

 
—

 
—

 
17,768

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
21,493,483

 
$
180,957

 
$
163,247

 
$
8,732

 
$
21,656,730

 
$
207,457


 
 
 
 
 
 
 
 
 
 
 
 
 
Schedule of Credit Quality Indicators [Table Text Block]
The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at June 30, 2019 is as follows (in thousands):
 
 
Internally Risk Graded
 
Non-Graded
 
Total
 
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related
Allowance
Commercial
 
$
14,307,867

 
$
105,435

 
$
29,041

 
$
962

 
$
14,336,908

 
$
106,397

Commercial real estate
 
4,710,033

 
54,188

 
—

 
—

 
4,710,033

 
54,188

Residential mortgage
 
279,905

 
3,318

 
1,890,917

 
12,406

 
2,170,822

 
15,724

Personal
 
949,413

 
7,074

 
88,476

 
2,314

 
1,037,889

 
9,388

Total
 
20,247,218

 
170,015

 
2,008,434

 
15,682

 
22,255,652

 
185,697

 
 
 
 
 
 
 
 
 
 
 
 
 
Nonspecific allowance
 
—

 
—

 
—

 
—

 
—

 
16,837

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
20,247,218

 
$
170,015

 
$
2,008,434

 
$
15,682

 
$
22,255,652

 
$
202,534

 
The allowance for loan losses and recorded investment of the related loans by portfolio segment for risk graded and non-risk graded loans at December 31, 2018 is as follows (in thousands):
 
 
Internally Risk Graded
 
Non-Graded
 
Total
 
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related Allowance
 
Recorded Investment
 
Related
Allowance
Commercial
 
$
13,586,654

 
$
101,303

 
$
49,424

 
$
923

 
$
13,636,078

 
$
102,226

Commercial real estate
 
4,764,813

 
60,026

 
—

 
—

 
4,764,813

 
60,026

Residential mortgage
 
505,046

 
3,310

 
1,724,987

 
14,654

 
2,230,033

 
17,964

Personal
 
948,890

 
6,633

 
76,916

 
2,840

 
1,025,806

 
9,473

Total
 
19,805,403

 
171,272

 
1,851,327

 
18,417

 
21,656,730

 
189,689

 
 
 
 
 
 
 
 
 
 
 
 
 
Nonspecific allowance
 
—

 
—

 
—

 
—

 
—

 
17,768

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
19,805,403

 
$
171,272

 
$
1,851,327

 
$
18,417

 
$
21,656,730

 
$
207,457

 
 
 
 
 
 
 
 
 
 
 
 
 


Loans are considered to be performing if they are in compliance with the original terms of the agreement and currently exhibit no factors that cause management to have doubts about the borrowers' ability to remain in compliance with the original terms of the agreement, which is consistent with the regulatory guideline of “pass.” Performing loans also include past due residential mortgages that are guaranteed by agencies of the U.S. government that continue to accrue interest based on criteria of the guarantors' programs. Other loans especially mentioned are currently performing in compliance with the original terms of the agreement but may have a potential weakness that deserves management’s close attention, consistent with regulatory guidelines. 

The risk grading process identified certain loans that have a well-defined weakness (e.g. inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for “substandard.” Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans were not placed in nonaccruing status. 

Nonaccruing loans represent loans for which full collection of principal and interest is uncertain. This is substantially the same criteria used to determine whether a loan is impaired and includes certain loans considered “substandard” and all loans considered “doubtful” by regulatory guidelines.

The following table summarizes the Company’s loan portfolio at June 30, 2019 by the risk grade categories (in thousands): 
 
 
Internally Risk Graded
 
Non-Graded
 
 
 
 
Performing
 
 
 
 
 
 
 
 
 
 
Pass
 
Other Loans Especially Mentioned
 
Accruing Substandard
 
Nonaccrual
 
Performing
 
Nonaccrual
 
Total
Commercial:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Energy
 
$
3,774,846

 
$
12,871

 
$
62,004

 
$
71,632

 
$
—

 
$
—

 
$
3,921,353

Services
 
3,221,580

 
50,662

 
27,129

 
10,087

 
—

 
—

 
3,309,458

Wholesale/retail
 
1,767,002

 
13,080

 
11,646

 
1,390

 
—

 
—

 
1,793,118

Manufacturing
 
709,460

 
29,056

 
14,228

 
8,613

 
—

 
—

 
761,357

Healthcare
 
2,882,190

 
15,089

 
13,083

 
16,148

 
—

 
—

 
2,926,510

Public finance
 
795,659

 
—

 
—

 
—

 
—

 
—

 
795,659

Other commercial and industrial
 
761,650

 
2,831

 
20,488

 
15,443

 
28,959

 
82

 
829,453

Total commercial
 
13,912,387

 
123,589

 
148,578

 
123,313

 
28,959

 
82

 
14,336,908

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 
 

 
 
 
 

 
 

 
 

 
 

 
 

Residential construction and land development
 
141,159

 
—

 
—

 
350

 
—

 
—

 
141,509

Retail
 
792,406

 
11,664

 
1,272

 
20,057

 
—

 
—

 
825,399

Office
 
1,048,029

 
4,197

 
3,225

 
855

 
—

 
—

 
1,056,306

Multifamily
 
1,293,248

 
1,200

 
5,649

 
275

 
—

 
—

 
1,300,372

Industrial
 
828,569

 
—

 
—

 
—

 
—

 
—

 
828,569

Other commercial real estate
 
557,038

 
547

 
160

 
133

 
—

 
—

 
557,878

Total commercial real estate
 
4,660,449

 
17,608

 
10,306

 
21,670

 
—

 
—

 
4,710,033

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 
 

 
 
 
 

 
 

 
 

 
 

 
 

Permanent mortgage
 
276,782

 
115

 
2,206

 
803

 
787,464

 
21,000

 
1,088,370

Permanent mortgages guaranteed by U.S. government agencies
 
—

 
—

 
—

 
—

 
188,630

 
6,743

 
195,373

Home equity
 
—

 
—

 
—

 
—

 
877,148

 
9,931

 
887,079

Total residential mortgage
 
276,782

 
115

 
2,206

 
803

 
1,853,242

 
37,674

 
2,170,822

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Personal
 
949,258

 
46

 
33

 
76

 
88,315

 
161

 
1,037,889

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
19,798,876

 
$
141,358

 
$
161,123

 
$
145,862

 
$
1,970,516

 
$
37,917

 
$
22,255,652



The following table summarizes the Company’s loan portfolio at December 31, 2018 by the risk grade categories (in thousands): 
 
 
Internally Risk Graded
 
Non-Graded
 
 
 
 
Performing
 
 
 
 
 
 
 
 
 
 
Pass
 
Other Loans Especially Mentioned
 
Accruing Substandard
 
Nonaccrual
 
Performing
 
Nonaccrual
 
Total
Commercial:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Energy
 
$
3,414,039

 
$
42,176

 
$
86,624

 
$
47,494

 
$
—

 
$
—

 
$
3,590,333

Services
 
3,167,203

 
49,761

 
32,661

 
8,567

 
—

 
—

 
3,258,192

Wholesale/retail
 
1,593,902

 
18,809

 
7,131

 
1,316

 
—

 
—

 
1,621,158

Manufacturing
 
668,438

 
30,934

 
22,230

 
8,919

 
—

 
—

 
730,521

Healthcare
 
2,730,121

 
14,920

 
37,698

 
16,538

 
—

 
—

 
2,799,277

Public finance
 
804,550

 
—

 
—

 
—

 
—

 
—

 
804,550

Other commercial and industrial
 
756,815

 
1,266

 
7,588

 
16,954

 
49,371

 
53

 
832,047

Total commercial
 
13,135,068

 
157,866

 
193,932

 
99,788

 
49,371

 
53

 
13,636,078

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 
 

 
 
 
 

 
 

 
 

 
 

 
 

Residential construction and land development
 
148,234

 
—

 
—

 
350

 
—

 
—

 
148,584

Retail
 
885,588

 
11,926

 
1,289

 
20,279

 
—

 
—

 
919,082

Office
 
1,059,334

 
10,532

 
3,054

 
—

 
—

 
—

 
1,072,920

Multifamily
 
1,287,471

 
281

 
12

 
301

 
—

 
—

 
1,288,065

Industrial
 
776,898

 
—

 
1,208

 
—

 
—

 
—

 
778,106

Other commercial real estate
 
555,301

 
1,188

 
876

 
691

 
—

 
—

 
558,056

Total commercial real estate
 
4,712,826

 
23,927

 
6,439

 
21,621

 
—

 
—

 
4,764,813

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 
 

 
 
 
 

 
 

 
 

 
 

 
 

Permanent mortgage
 
269,678

 
52

 
9,730

 
1,991

 
819,199

 
21,960

 
1,122,610

Permanent mortgages guaranteed by U.S. government agencies
 
—

 
—

 
—

 
—

 
183,734

 
7,132

 
190,866

Home equity
 
223,298

 
—

 
296

 
—

 
682,491

 
10,472

 
916,557

Total residential mortgage
 
492,976

 
52

 
10,026

 
1,991

 
1,685,424

 
39,564

 
2,230,033

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Personal
 
944,256

 
115

 
4,443

 
76

 
76,762

 
154

 
1,025,806

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
19,285,126

 
$
181,960

 
$
214,840

 
$
123,476

 
$
1,811,557

 
$
39,771

 
$
21,656,730

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Summary of Impaired Loans [Table Text Block]
Impaired Loans

Loans are considered to be impaired when it is probable that the Company will not be able to collect all amounts due according to the contractual terms of the loan agreement. This generally includes all nonaccruing loans, all loans modified in a TDR and all loans repurchased from GNMA pools.

A summary of impaired loans at June 30, 2019 follows (in thousands):
 
As of
 
For the
 
For the
 
June 30, 2019
 
Three Months Ended
 
Six Months Ended
 
 
 
Recorded Investment
 
 
 
June 30, 2019
 
June 30, 2019
 
Unpaid
Principal
Balance
 
Total
 
With No
Allowance
 
With Allowance
 
Related Allowance
 
Average Recorded
Investment
 
Interest Income Recognized
 
Average Recorded
Investment
 
Interest Income Recognized
Commercial:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Energy
$
118,959

 
$
71,632

 
$
64,066

 
$
7,566

 
$
1,175

 
$
58,185

 
$
—

 
$
59,074

 
$
—

Services
13,343

 
10,087

 
10,061

 
26

 
26

 
10,309

 
—

 
7,156

 
—

Wholesale/retail
1,600

 
1,390

 
1,126

 
264

 
101

 
1,407

 
—

 
1,030

 
—

Manufacturing1
8,896

 
8,613

 
8,383

 
230

 
236

 
9,080

 
—

 
8,384

 
—

Healthcare
30,255

 
16,148

 
14,972

 
1,176

 
2,500

 
17,441

 
—

 
13,632

 
—

Public finance
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other commercial and industrial
25,838

 
15,525

 
15,525

 
—

 
—

 
15,627

 
—

 
16,113

 
—

Total commercial
198,891

 
123,395

 
114,133

 
9,262

 
4,038

 
112,049

 
—

 
105,389

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

Residential construction and land development
1,306

 
350

 
350

 
—

 
—

 
350

 
—

 
350

 
—

Retail
20,380

 
20,057

 
20,057

 
—

 
—

 
20,108

 
—

 
20,168

 
—

Office
855

 
855

 
855

 
—

 
—

 
855

 
—

 
427

 
—

Multifamily
275

 
275

 
275

 
—

 
—

 
138

 
—

 
288

 
—

Industrial
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

 
—

Other commercial real estate
293

 
133

 
133

 
—

 
—

 
139

 
—

 
412

 
—

Total commercial real estate
23,109

 
21,670

 
21,670

 
—

 
—

 
21,590

 
—

 
21,645

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

Permanent mortgage
26,434

 
21,803

 
21,803

 
—

 
—

 
22,370

 
316

 
22,877

 
614

Permanent mortgage guaranteed by U.S. government agencies2
201,217

 
195,373

 
195,373

 
—

 
—

 
191,537

 
1,938

 
193,958

 
3,843

Home equity
11,728

 
9,931

 
9,931

 
—

 
—

 
10,228

 
—

 
10,202

 
—

Total residential mortgage
239,379

 
227,107

 
227,107

 
—

 
—

 
224,135

 
2,254

 
227,037

 
4,457

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Personal
289

 
237

 
237

 
—

 
—

 
269

 
—

 
234

 
—

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total
$
461,668

 
$
372,409

 
$
363,147

 
$
9,262

 
$
4,038

 
$
358,043

 
$
2,254

 
$
354,305

 
$
4,457

1 
Impaired manufacturing sector loans included $4.7 million of loans from an affiliated entity, with no allowance as the fair value of the collateral exceeded the outstanding principal balance at June 30, 2019.
2 All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At June 30, 2019, the majority were accruing based on the guarantee by U.S. government agencies.


Generally, no interest income is recognized on impaired loans until all principal balances, including amounts charged-off, are recovered.

A summary of impaired loans at December 31, 2018 follows (in thousands): 
 
 
 
 
Recorded Investment
 
 
Unpaid
Principal
Balance
 
Total
 
With No
Allowance
 
With Allowance
 
Related Allowance
Commercial:
 
 
 
 
 
 
 
 
 
 
Energy
 
$
79,675

 
$
47,494

 
$
18,639

 
$
28,855

 
$
5,362

Services
 
13,437

 
8,567

 
8,489

 
78

 
74

Wholesale/retail
 
1,722

 
1,316

 
1,015

 
301

 
101

Manufacturing
 
10,055

 
8,919

 
8,673

 
246

 
246

Healthcare
 
24,319

 
16,538

 
10,563

 
5,975

 
2,949

Public finance
 
—

 
—

 
—

 
—

 
—

Other commercial and industrial
 
26,955

 
17,007

 
17,007

 
—

 
—

Total commercial
 
156,163

 
99,841

 
64,386

 
35,455

 
8,732

 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 
 

 
 

 
 

 
 

 
 

Residential construction and land development
 
1,306

 
350

 
350

 
—

 
—

Retail
 
27,680

 
20,279

 
20,279

 
—

 
—

Office
 
—

 
—

 
—

 
—

 
—

Multifamily
 
301

 
301

 
301

 
—

 
—

Industrial
 
—

 
—

 
—

 
—

 
—

Other commercial real estate
 
851

 
691

 
691

 
—

 
—

Total commercial real estate
 
30,138

 
21,621

 
21,621

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 
 

 
 

 
 

 
 

 
 

Permanent mortgage
 
28,716

 
23,951

 
23,951

 
—

 
—

Permanent mortgage guaranteed by U.S. government agencies1
 
196,296

 
190,866

 
190,866

 
—

 
—

Home equity
 
12,196

 
10,472

 
10,472

 
—

 
—

Total residential mortgage
 
237,208

 
225,289

 
225,289

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
Personal
 
278

 
230

 
230

 
—

 
—

 
 
 
 
 
 
 
 
 
 
 
Total
 
$
423,787

 
$
346,981

 
$
311,526

 
$
35,455

 
$
8,732

1 
All permanent mortgage loans guaranteed by U.S. government agencies are considered impaired as we do not expect full collection of contractual principal and interest. At December 31, 2018, the majority were accruing based on the guarantee by U.S. government agencies.
Summary of Loans by Aging Status [Table Text Block]
Nonaccrual & Past Due Loans

Past due status for all loan classes is based on the actual number of days since the last payment was due according to the contractual terms of the loans.

A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of June 30, 2019 is as follows (in thousands):
 
 
 
 
Past Due
 
 
 
 
 
 
Current
 
30 to 59
Days
 
60 to 89 Days
 
90 Days
or More
 
Nonaccrual
 
Total
Commercial:
 
 
 
 
 
 
 
 
 
 
 
 
Energy
 
$
3,849,711

 
$
10

 
$
—

 
$
—

 
$
71,632

 
$
3,921,353

Services
 
3,297,119

 
1,045

 
759

 
448

 
10,087

 
3,309,458

Wholesale/retail
 
1,787,095

 
2,954

 
189

 
1,490

 
1,390

 
1,793,118

Manufacturing
 
750,517

 
197

 
2,030

 
—

 
8,613

 
761,357

Healthcare
 
2,909,249

 
383

 
609

 
121

 
16,148

 
2,926,510

Public finance
 
795,659

 
—

 
—

 
—

 
—

 
795,659

Other commercial and industrial
 
811,129

 
2,037

 
762

 
—

 
15,525

 
829,453

Total commercial
 
14,200,479

 
6,626

 
4,349

 
2,059

 
123,395

 
14,336,908

 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 
 

 
 

 
 
 
 

 
 

 
 

Residential construction and land development
 
140,555

 
604

 
—

 
—

 
350

 
141,509

Retail
 
805,342

 
—

 
—

 
—

 
20,057

 
825,399

Office
 
1,055,034

 
—

 
353

 
64

 
855

 
1,056,306

Multifamily
 
1,299,665

 
131

 
301

 
—

 
275

 
1,300,372

Industrial
 
827,660

 
—

 
909

 
—

 
—

 
828,569

Other commercial real estate
 
556,562

 
111

 
544

 
528

 
133

 
557,878

Total commercial real estate
 
4,684,818

 
846

 
2,107

 
592

 
21,670

 
4,710,033

 
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 
 

 
 

 
 
 
 

 
 

 
 

Permanent mortgage
 
1,062,889

 
3,641

 
—

 
37

 
21,803

 
1,088,370

Permanent mortgages guaranteed by U.S. government agencies
 
49,015

 
23,742

 
21,619

 
94,254

 
6,743

 
195,373

Home equity
 
875,215

 
1,380

 
553

 
—

 
9,931

 
887,079

Total residential mortgage
 
1,987,119

 
28,763

 
22,172

 
94,291

 
38,477

 
2,170,822

 
 
 
 
 
 
 
 
 
 
 
 
 
Personal
 
1,035,045

 
2,509

 
88

 
10

 
237

 
1,037,889

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
21,907,461

 
$
38,744

 
$
28,716

 
$
96,952

 
$
183,779

 
$
22,255,652


A summary of loans currently performing, loans past due and accruing and nonaccrual loans as of December 31, 2018 is as follows (in thousands):

 
 
 
 
Past Due
 
 
 
 
 
 
Current
 
30 to 59
Days
 
60 to 89 Days
 
90 Days
or More
 
Nonaccrual
 
Total
Commercial:
 
 
 
 
 
 
 
 
 
 
 
 
Energy
 
$
3,542,839

 
$
—

 
$
—

 
$
—

 
$
47,494

 
$
3,590,333

Services
 
3,237,578

 
6,009

 
6,038

 
—

 
8,567

 
3,258,192

Wholesale/retail
 
1,619,290

 
515

 
37

 
—

 
1,316

 
1,621,158

Manufacturing
 
721,204

 
392

 
6

 
—

 
8,919

 
730,521

Healthcare
 
2,781,944

 
241

 
—

 
554

 
16,538

 
2,799,277

Public finance
 
804,550

 
—

 
—

 
—

 
—

 
804,550

Other commercial and industrial
 
814,489

 
518

 
25

 
8

 
17,007

 
832,047

Total commercial
 
13,521,894

 
7,675

 
6,106

 
562

 
99,841

 
13,636,078

 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial real estate:
 
 

 
 

 
 
 
 

 
 

 
 

Residential construction and land development
 
147,705

 
249

 
280

 
—

 
350

 
148,584

Retail
 
884,424

 
14,379

 
—

 
—

 
20,279

 
919,082

Office
 
1,072,920

 
—

 
—

 
—

 
—

 
1,072,920

Multifamily
 
1,287,483

 
281

 
—

 
—

 
301

 
1,288,065

Industrial
 
776,898

 
1,208

 
—

 
—

 
—

 
778,106

Other commercial real estate
 
556,239

 
412

 
—

 
714

 
691

 
558,056

Total commercial real estate
 
4,725,669

 
16,529

 
280

 
714

 
21,621

 
4,764,813

 
 
 
 
 
 
 
 
 
 
 
 
 
Residential mortgage:
 
 

 
 

 
 
 
 

 
 

 
 

Permanent mortgage
 
1,095,097

 
3,196

 
366

 
—

 
23,951

 
1,122,610

Permanent mortgages guaranteed by U.S. government agencies
 
37,459

 
24,369

 
16,345

 
105,561

 
7,132

 
190,866

Home equity
 
904,572

 
1,102

 
352

 
59

 
10,472

 
916,557

Total residential mortgage
 
2,037,128

 
28,667

 
17,063

 
105,620

 
41,555

 
2,230,033

 
 
 
 
 
 
 
 
 
 
 
 
 
Personal
 
1,024,298

 
479

 
796

 
3

 
230

 
1,025,806

 
 
 
 
 
 
 
 
 
 
 
 
 
Total
 
$
21,308,989

 
$
53,350

 
$
24,245

 
$
106,899

 
$
163,247

 
$
21,656,730