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Regulatory & Capital Matters (Details)		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019	Dec. 31, 2018
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)	11.54%	11.54%	10.08%
Risk-based capital ratio (as a percent)	14.34%	14.34%	12.63%
Risk-based capital ratio, basis point decrease (as a percent)	158.00%
Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio (as a percent)	12.68%	12.68%	11.36%
Risk-based capital ratio (as a percent)	15.72%	15.72%	14.14%
Tier One leverage ratio, basis point increase (as a percent)		1.32%
Minimum [Member] | Subsidiaries [Member]
Regulatory & Capital Matters
Tier 1 capital leverage ratio, board-designated threshold	8.00%	8.00%
Total Capital Ratio, board-designated threshold (as a percent)	12.00%	12.00%

X

- Definition

Represents the board-designated threshold for Total Capital divided by risk weighted assets as defined in the regulations.

+ References

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- Definition

Board-designated threshold for Tier 1 Leverage Capital divided by average assets as defined in the regulations.

+ References

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- Definition

Represents the basis point increase in the risk-based capital ratio over prior period.

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Represents the basis point increase in the Tier One leverage capital over prior period.

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- 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)
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Tier 1 Leverage Capital divided by average assets as defined in the regulations.

+ References

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-Name Accounting Standards Codification
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-Section 50
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