Investments in WTLPG - Information for Significant Unconsolidated Equity Method Investees (Details) - WTLPG - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Jul. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Total Assets	$ 928,349	$ 837,163
Long-Term Debt	0	0
Members’ Equity/Partners' Capital	868,894	787,426
Revenues	55,534	87,048
Net Income	$ 16,642	$ 21,571