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Investments in Unconsolidated Entities - Schedule of Cumulative Investment in Entities on Equity Method, Including Share of Earnings and Losses (Detail) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Schedule of Investments [Line Items]
Investments in unconsolidated entities	$ 5,410	$ 5,870
Limited Liability Company Interests [Member]
Schedule of Investments [Line Items]
Investments in unconsolidated entities	2,701	2,687
General Partnership Interests [Member]
Schedule of Investments [Line Items]
Investments in unconsolidated entities	$ 2,709	$ 3,183

X

- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- 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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