Recalibration and updates of the enviromental factors adjustments.

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- Definition

Estimated effect of the hurricanes could results in loan losses.

+ References

No definition available.

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- Definition

Expenses from structural damages caused by the hurricanes to branches, buildings ans repossessed properties, net of insurance receivables.

+ References

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Management increase the enviromental factors reserve using the near mid-range as the best estimate.

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Other operating expenses are reflected for cost such as donations, debris removal, fuel for backup generators and other ancillary cost associated with hurricane recovery efforts.

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- Definition

The amount recovered from insurance. These recoveries reduce costs and losses that are reported as a separate line item under operating expenses.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.3)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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- Definition

Amount of expense related to estimated loss from loan and lease transactions.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.11)
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=66008989&loc=SL6953423-111524

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Hurricanes Impact - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2017	Sep. 30, 2016
Hurricanes Impact [Line Items]
Provision for Loan and Lease Losses		$ 253,936	$ 128,651
Hurricanes
Hurricanes Impact [Line Items]
Insurance recoveries	$ 7,500
Provision for Loan and Lease Losses	69,887
Change Allowance For Loan Losses Recalibration And Enhancements Of The Enviromental Factors Adjustments	57,900	57,900
Expenses From Structural Damages Net Of Insurance Receivables	6,600
Other Operating Expenses Net Of Insurance Receivable	$ 2,900
Increase Enviromental Factor Reserve	$64.3 million to $122.2 million
Hurricanes \| Maximum
Hurricanes Impact [Line Items]
Estimated Loan Losses Range	$ 160,000	160,000
Hurricanes \| Minimum
Hurricanes Impact [Line Items]
Estimated Loan Losses Range	70,000	$ 70,000
Hurricanes \| ASC Subtopic 310-30
Hurricanes Impact [Line Items]
Provision for Loan and Lease Losses	$ 5,600