Allowance for Loan Losses - Reconciliation of Nonaccrual Loans to Impaired Loans (Detail) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Receivables [Abstract]
Nonaccrual loans	$ 3,474	$ 6,496
Nonaccrual loans not individually evaluated for impairment	(1,279)	(854)
Nonaccrual impaired loans	2,195	5,642
TDRs on accrual	3,803	2,214
Other impaired loans on accrual	2,170	1,251
Total impaired loans	$ 8,168	$ 9,107

Financing receivable modifications accrual.

No definition available.

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- Definition

Loans and leases receivable impaired accrual of interest.

+ References

No definition available.

+ Details

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- Definition

Loans and leases receivable impaired nonaccrual of interest.

+ References

No definition available.

+ Details

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- Definition

Loans and leases receivable nonaccrual not individually evaluated for impairment.

+ References

No definition available.

+ Details

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- Definition

Amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 14A
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953550-111524

+ Details

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- Definition

Reflects the carrying amount of loans deemed to be questionable as to collection on which no interest is continuing to be recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=84173941&loc=d3e5111-111524

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- References

No definition available.

+ Details

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