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Fair Value Measurements (Narrative) (Detail)	9 Months Ended
	Sep. 30, 2017
Minimum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated selling costs	5.00%
Maximum [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated selling costs	10.00%

X

- Definition

Loans measured for impairment based on fair value of underlying collateral estimated costs.

+ References

No definition available.

+ Details

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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X

- Details

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X

- Details

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