Share-Based Compensation (Restricted Stock Units Expected to Vest) (Details) - Performance Based Restricted Stock Units shares in Thousands	Dec. 31, 2019 shares
Vesting on January 1, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest (in shares)	53
Not Expected to Vest (in shares)	5
Total (in shares)	58
Vesting on January 1, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest (in shares)	35
Not Expected to Vest (in shares)	14
Total (in shares)	49
Vesting on January 1, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest (in shares)	3
Not Expected to Vest (in shares)	45
Total (in shares)	48

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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 (c)(2)(i)-(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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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.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Not Expected to Vest, Outstanding, Number

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