Parent Company - Condensed Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Total revenue	$ 1,530,082	$ 1,878,718	$ 1,027,982
Operating Expenses:
Operations and administrative	116,232	66,769	62,123
Net income (loss)	(103,705)	620,192	18,898
Net income (loss) available for common stockholders	(58,595)	289,441	2,939
Other comprehensive income (loss):
Foreign exchange translation adjustment, net of taxes	(1,475)	(5,127)	9,117
Comprehensive income (loss) attributable to common stockholders	(59,512)	286,368	6,182
VFH
Revenues:
Total revenue	0	0	86,599
Operating Expenses:
Operations and administrative	3	1	181
Income (loss) before equity in income of subsidiary	(3)	(1)	86,418
Equity in income (loss) of subsidiary, net of tax	(29,416)	620,193	(83,479)
Net income (loss)	(29,419)	620,192	2,939
Net income (loss) available for common stockholders	(29,419)	620,192	2,939
Other comprehensive income (loss):
Foreign exchange translation adjustment, net of taxes	(565)	(3,073)	3,243
Comprehensive income (loss) attributable to common stockholders	(29,984)	617,119	6,182
Other | VFH
Revenues:
Total revenue	$ 0	$ 0	$ 86,599