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Subsequent Events (Narrative) (Details) $ in Millions |  |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Mar. 05, 2020 USD ($) officer shares | May 16, 2019 shares | Mar. 20, 2019 shares | Mar. 13, 2019 people shares | Dec. 31, 2019 shares | Dec. 31, 2018 shares | Dec. 31, 2017 shares
Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Number of people granted awards | people |  |  |  | 3 |  |  |
Number of RSUs granted (in shares) |  | 8,244 | 12,445 | 51,814 | 73,000 | 74,000 | 98,000
Award vesting period |  |  | 3 years | 3 years |  |  |
Subsequent Event | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Restricted stock units grant date fair value | $ | $ 1.2 |  |  |  |  |  |
Number of RSUs granted (in shares) | 44,269 |  |  |  |  |  |
Subsequent Event | Restricted Stock Units (RSUs) | Vesting on January 1, 2023 |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Award vesting rights (percentage) | 25.00% |  |  |  |  |  |
Subsequent Event | Performance Shares |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Award vesting period | 3 years |  |  |  |  |  |
Subsequent Event | Executive Officer | Restricted Stock Units (RSUs) |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Number of people granted awards | officer | 3 |  |  |  |  |  |
Subsequent Event | Executive Officer | Performance Shares |  |  |  |  |  |  |
Subsequent Event [Line Items] |  |  |  |  |  |  |
Percentage of performance based units on total units approved | 75.00% |  |  |  |  |  |

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
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