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Regulatory & Capital Matters (Details)	Dec. 31, 2019	Dec. 31, 2018
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)	11.93%	10.08%
Risk-based capital ratio (as a percent)	14.53%	12.63%
Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)	12.50%	11.36%
Risk-based capital ratio (as a percent)	15.23%	14.14%
Minimum [Member] | Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)	8.00%
Risk-based capital ratio (as a percent)	12.00%

X

- Definition

Total Capital divided by risk weighted 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 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=117337116&loc=SL5958568-112826

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- Definition

Tier 1 Leverage Capital 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
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