Consolidated 50% Owned Subsidiaries - Components of Noncontrolling Interest (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Noncontrolling Interest [Abstract]
Members’ interest subject to mandatory redemption	$ 40,000	$ 40,000
Net accumulated earnings	13,751	9,003
Total liability	$ 53,751	$ 49,003