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Consolidated Statements of Capital (Parenthetical) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Other comprehensive income, tax $ 0 $ (8)
Tax benefit from tax receivable agreement 0 $ 69,752
Class A Common Shares | IPO    
Underwriting discount and offering costs $ 21,294