Related Party Transactions (Affiliated Notes Receivable) (Details) - Affiliated Entity - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Total long-term notes receivable - affiliated	$ 122,566	$ 134,642
U.S. dollar floating rate notes
Related Party Transaction [Line Items]
Total long-term notes receivable - affiliated	$ 0	6,502
U.S. dollar floating rate notes | Minimum
Related Party Transaction [Line Items]
Interest Rates	3.83%
U.S. dollar floating rate notes | Maximum
Related Party Transaction [Line Items]
Interest Rates	4.25%
U.S. Dollar fixed rate notes
Related Party Transaction [Line Items]
Total long-term notes receivable - affiliated	$ 122,566	$ 128,140
U.S. Dollar fixed rate notes | Minimum
Related Party Transaction [Line Items]
Interest Rates	0.00%
U.S. Dollar fixed rate notes | Maximum
Related Party Transaction [Line Items]
Interest Rates	14.85%