• Filing Date: 2018-03-07
  • Form Type: 10-K
  • Description: Annual report
v3.8.0.1
Investments - Summary of Unaudited Financial Information and Unaudited Financial Position of Joint Venture (Parenthetical) (Detail)
12 Months Ended
Dec. 31, 2017
Dec. 15, 2016
Investments, Debt and Equity Securities [Abstract]    
Percentage of operating results 90.00% 90.00%