Share-Based Compensation (Restricted Stock Units Expected to Vest) (Details) - Performance Based Restricted Stock Units shares in Thousands	Dec. 31, 2016 shares
Vesting on January 1, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest	18
Not Expected to Vest	57
Total	75
Vesting on January 1, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest	14
Not Expected to Vest	47
Total	61
Vesting on January 1, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected to Vest	9
Not Expected to Vest	75
Total	84

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://www.xbrl.org/2003/role/presentationRef
-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=6415400&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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