Shareholders' and Members' Equity - Schedule of Restricted Stock Activity (Details) - Restricted Incentive Units - shares	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Series M Units, M-1
Number of Incentive Units
Beginning balance (in shares)	7,520	7,520
Issuances (in shares)	1,030	0
Forfeitures (in shares)	0	0
Ending balance (in shares)	8,550	7,520
Series M Units, M-2
Number of Incentive Units
Beginning balance (in shares)	7,520	7,520
Issuances (in shares)	1,030	0
Forfeitures (in shares)	0	0
Ending balance (in shares)	8,550	7,520
Series M Units, M-3
Number of Incentive Units
Beginning balance (in shares)	7,520	7,520
Issuances (in shares)	1,030	0
Forfeitures (in shares)	0	0
Ending balance (in shares)	8,550	7,520
Series M Units, M-4
Number of Incentive Units
Beginning balance (in shares)	7,520	7,520
Issuances (in shares)	1,030	0
Forfeitures (in shares)	0	0
Ending balance (in shares)	8,550	7,520
Series M Units
Number of Incentive Units
Beginning balance (in shares)	30,080	30,080
Issuances (in shares)	4,120	0
Forfeitures (in shares)	0	0
Ending balance (in shares)	34,200	30,080
Series Z Units, Z-1
Number of Incentive Units
Beginning balance (in shares)	4,313	4,328
Issuances (in shares)	485	0
Forfeitures (in shares)	(105)	(15)
Ending balance (in shares)	4,693	4,313
Series Z Units, Z-2
Number of Incentive Units
Beginning balance (in shares)	4,313	4,328
Issuances (in shares)	485	0
Forfeitures (in shares)	(105)	(15)
Ending balance (in shares)	4,693	4,313
Series Z Units, Z-3
Number of Incentive Units
Beginning balance (in shares)	4,313	4,328
Issuances (in shares)	485	0
Forfeitures (in shares)	(105)	(15)
Ending balance (in shares)	4,693	4,313
Series Z Units, Z-4
Number of Incentive Units
Beginning balance (in shares)	4,313	4,328
Issuances (in shares)	485	0
Forfeitures (in shares)	(105)	(15)
Ending balance (in shares)	4,693	4,313
Series Z Units
Number of Incentive Units
Beginning balance (in shares)	17,252	17,312
Issuances (in shares)	1,940	0
Forfeitures (in shares)	(420)	(60)
Ending balance (in shares)	18,772	17,252

Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event.

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- Definition

Net number of non-option equity instruments granted to participants.

+ References

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- Definition

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

+ 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 (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-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=116856206&loc=d3e5070-113901

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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.

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