Represents the maximum payout of shares granted upon the actual performance against the Performance Measures.

No definition available.

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- Definition

Represents the minimum payout of shares granted upon the actual performance against the Performance Measures.

+ References

No definition available.

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Represents information pertaining to period over which the relative total shareholder return is to be calculated to enable vesting of share-based payment awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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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.

+ References

No definition available.

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- Definition

Number of non-option equity instruments exercised by participants.

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- Definition

Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

+ 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)(1)(i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Percentage of vesting of share-based compensation awards.

+ References

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- Definition

Value, after forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 30
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=95456744&loc=d3e3913-113898

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 30
-Section 35
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6418191&loc=d3e15009-113911

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- Definition

Value, before forfeitures, of stock or other type of equity granted of any equity-based compensation plan other than an employee stock ownership plan (ESOP).

+ References

No definition available.

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Stock-Based Compensation - 2016 Market-Based RSAs and RSUs (Details) - 2016 Market-Based RSAs and RSUs - TSR and Performance Measures - USD ($) $ in Millions		1 Months Ended	3 Months Ended
	Jan. 14, 2016	Feb. 28, 2018	Mar. 31, 2018
Market-Based RSAs and RSUs \| Released on February 20, 2018
Stock-based compensation
Vesting percentage		66.70%
Market-Based RSAs and RSUs \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage		33.30%
Market-Based RSAs and RSUs \| Senior Management
Stock-based compensation
Timeframe for calculation of TSR	2 years
Minimum payout of shares (in shares)	0
Maximum payout of shares (in shares)	328,688
Aggregate value recognized as compensation expense	$ 2.0
Market-Based RSAs and RSUs \| Senior Management \| Released on February 20, 2018
Stock-based compensation
Vesting percentage	66.70%
Market-Based RSAs and RSUs \| Senior Management \| Vesting on February 20, 2019
Stock-based compensation
Vesting percentage	33.30%
Market-Based RSAs \| Released on February 20, 2018
Stock-based compensation
Exercised (in shares)		69,440
Market-Based RSAs \| Vesting on February 20, 2019
Stock-based compensation
Outstanding (in shares)		34,720
Market-Based RSAs \| Senior Management
Stock-based compensation
Granted (in shares)	282,394
Forfeited (in shares)		59,411
Vested (in shares)		118,821
Stock-based compensation, net			$ 0.7
Market-Based RSUs \| Released on February 20, 2018
Stock-based compensation
Exercised (in shares)		30,862
Market-Based RSUs \| Vesting on February 20, 2019
Stock-based compensation
Outstanding (in shares)		15,432
Market-Based RSUs \| Senior Management
Stock-based compensation
Granted (in shares)	46,294