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Share-Based Payments - Summary of Grants, Exchanges and Forfeitures of Restricted Stock and RSUs (Details) - LTIP [Member] - shares | 3 Months Ended | 12 Months Ended
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Mar. 31, 2018 | Dec. 31, 2015
Restricted Stock [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |
Outstanding, beginning balance (in shares) |  | 105,561
Vested (in shares) |  | (2,749)
Outstanding, ending balance (in shares) |  | 102,812
RSU [Member] |  |
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] |  |
Outstanding, beginning balance (in shares) |  | 1,632,746
Vested (in shares) | (603,677) | 0
Outstanding, ending balance (in shares) |  | 1,632,746

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- Definition 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. + References 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=96867065&loc=d3e5070-113901 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References 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)(iii)(2) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Details
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- Details
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