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Share and Incentive-Based Compensation - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2019	Oct. 31, 2016
Share and Incentive Based Compensation Arrangement
Shares authorized for issuance (in shares)		4.6
Restricted Stock
Share and Incentive Based Compensation Arrangement
Unvested awards (in shares)	0.3
Weighted average grant date fair value	$ 13.56
Compensation yet not yet recognized	$ 3.1
Compensation yet not yet recognized period	1 year 8 months 12 days
Minimum | Restricted Stock
Share and Incentive Based Compensation Arrangement
Vesting period	1 year
Maximum | Restricted Stock
Share and Incentive Based Compensation Arrangement
Vesting period	3 years

X

- Definition

Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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

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- Definition

Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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-Section 50
-Paragraph 2
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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.

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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.

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- Definition

Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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-Publisher FASB
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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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No definition available.

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Number of shares authorized for issuance under share-based payment arrangement.

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-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
-Paragraph 2
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