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Segment Results (Detail) - USD ($)
$ in Thousands

12 Months Ended

Dec. 31, 2016

Dec. 31, 2015

Dec. 31, 2014

Segment Reporting Information [Line Items]

Net interest income

$ 1,287,382

$ 408,075

$ 1,140,353

Provision for (recovery of) losses

4,180

(15,004)

(18,587)

Non-interest income

^[1]

145,572

210,763

201,593

Non-interest expense

^[2]

651,646

765,855

587,467

Income (loss) before income taxes

777,128

(132,013)

773,066

Income tax expense (benefit)

281,727

(84,857)

287,669

Net income (loss)

495,401

(47,156)

485,397

Identifiable segment assets (period-end)

48,926,555

50,317,796

48,559,217

Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

145,572

210,763

201,593

Banking Operations

Segment Reporting Information [Line Items]

Net interest income

1,272,423

393,074

1,126,162

Provision for (recovery of) losses

4,180

(15,004)

(18,587)

Non-interest income

^[1]

116,200

154,847

135,834

Non-interest expense

^[2]

584,894

700,469

528,436

Income (loss) before income taxes

781,904

(152,903)

738,626

Income tax expense (benefit)

283,656

(93,297)

274,179

Net income (loss)

498,248

(59,606)

464,447

Identifiable segment assets (period-end)

48,195,581

49,619,931

47,897,672

Banking Operations | Inter-segment

Segment Reporting Information [Line Items]

Non-interest income

(17,645)

(15,359)

(13,521)

Banking Operations | Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

98,555

139,488

122,313

Residential Mortgage Banking

Segment Reporting Information [Line Items]

Net interest income

14,959

15,001

14,191

Non-interest income

^[1]

29,372

55,916

65,759

Non-interest expense

^[2]

66,752

65,386

59,031

Income (loss) before income taxes

(4,776)

20,890

34,440

Income tax expense (benefit)

(1,929)

8,440

13,490

Net income (loss)

(2,847)

12,450

20,950

Identifiable segment assets (period-end)

730,974

697,865

661,545

Residential Mortgage Banking | Inter-segment

Segment Reporting Information [Line Items]

Non-interest income

17,645

15,359

13,521

Residential Mortgage Banking | Operating Segments

Segment Reporting Information [Line Items]

Non-interest income

$ 47,017

$ 71,275

$ 79,280

[1]	Includes ancillary fee income.
[2]	Includes both direct and indirect expenses.

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