Common equity tier one capital required for capital adequacy to risk weighted assets.

No definition available.

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- Definition

Tier one risk based capital required capital conservation buffer ratio.

+ References

No definition available.

+ Details

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- Definition

Tier one risk based capital required minimum capital conversion buffer.

+ References

No definition available.

+ Details

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- Definition

The minimum Total risk based capital ratio (total capital divided by risk weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Topic 942
-SubTopic 505
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826

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- Definition

Percentage of Common Equity Tier One Risk-based Capital to total risk-weighted assets, as defined by regulatory framework.

+ References

No definition available.

+ Details

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- 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.

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- Definition

Amount of risk-weighted assets as calculated in accordance with U.S. Federal regulatory capital standards.

+ References

No definition available.

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- Definition

The minimum amount of Tier 1 Leverage Capital for capital adequacy purposes divided by average assets as defined in the regulations.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
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- Definition

The minimum amount of Tier 1 Risk Based Capital required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

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- Definition

The minimum Tier One Capital Ratio (Tier one capital divided by risk-weighted assets) required for capital adequacy purposes under the regulatory framework for prompt corrective action.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826

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Regulatory Matters - Additional Information (Detail) - USD ($) $ in Thousands	1 Months Ended	6 Months Ended
	Jan. 31, 2016	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2015
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier one capital ratio		4.50%	4.50%
Tier 1 risk based capital ratios		6.00%	6.00%
Total risk based capital ratio		8.00%	8.00%
Common equity Tier 1 risk-based capital ratio		14.90%	15.20%
Minimum capital conservation buffer	0.625%	1.875%
Total assets		$ 15,000,000
Common equity tier 1 capital assets		39,384	$ 37,764
Maximum [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier 1 capital assets		$ 250,000,000
Bank Holding Companies and Banks Subject to the rules [Member]
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Common equity tier one capital ratio		4.50%
Tier 1 risk based capital ratios	8.50%	6.00%		4.00%
Total risk based capital ratio	10.50%	8.00%
Tier 1 leverage ratio		4.00%
Capital conservation buffer ratio		2.50%
Common equity Tier 1 risk-based capital ratio	7.00%