Stock-based Compensation - Performance Unit Awards - General Information (Details) - Performance Unit Awards - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
Sep. 30, 2017	Dec. 31, 2016
Stock-based Compensation
Performance period (in years)	3 years
Estimated final value upon vesting	$ 0.4	$ 1.3
Fair value	$ 0.8
Low
Stock-based Compensation
Vested (in dollars per share)	$ 0.00
High
Stock-based Compensation
Vested (in dollars per share)	$ 200.00

Fair value of share-based awards, other than options, upon vesting.

No definition available.

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- Definition

Grant date fair value of share-based awards, other than options, upon vesting.

+ References

No definition available.

+ Details

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- Definition

Represents performance period considered for vesting of performance based units.

+ References

No definition available.

+ Details

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- References

No definition available.

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ 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=6415400&loc=d3e5070-113901

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