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, 2016 |
Dec. 31, 2015 |
---|---|---|
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | $ 17,546 | $ 18,999 |
Limited Liability Company Interests [Member] | ||
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | 14,327 | 15,739 |
General Partnership Interests [Member] | ||
Schedule of Investments [Line Items] | ||
Investments in unconsolidated entities | $ 3,219 | $ 3,260 |