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Regulatory Matters- Summary (Details) | Jun. 30, 2020 | Dec. 31, 2019 | Jan. 01, 2019 | Jan. 01, 2016
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Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |
Common Equity Tier 1 required for capital adequacy purposes, ratio (as a percent) | 4.50% | 4.50% |  |
Tier 1 required for capital adequacy purposes, ratio (as a percent) | 6.00% | 6.00% |  |
Total capital required for capital adequacy purposes, ratio (as a percent) | 8.00% | 8.00% |  |
Leverage required for capital adequacy purposes, ratio (as a percent) | 4.00% | 4.00% |  |
Conservation Buffer Rule Starting January 2016 |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |
Capital conservation buffer (as a percent) |  |  |  | 0.625%
Conservation Buffer Rule Subsequent to 2016 |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |
Capital conservation buffer annual increase (as a percent) |  |  |  | 0.625%
Conservation Buffer Rule |  |  |  |
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items] |  |  |  |
Capital conservation buffer (as a percent) |  |  | 2.50% |

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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=117337116&loc=SL5958568-112826 Reference 2: 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=117337116&loc=SL5958570-112826 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 505 -Section 50 -Paragraph 1H -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117337116&loc=d3e65071-112826 + Details
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