Supplemental Cash Flow Information - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Continuing operations
Cash and cash equivalents	$ 34,007	$ 44,226	$ 716,750	$ 80,398
Restricted cash	68,033	67,206	84,982	13,385
Cash, cash equivalents and restricted cash	102,040	111,432	801,732	93,783
Discontinued operations
Cash and cash equivalents	40,161	53,085	66,791	63,834
Restricted cash	5,817	17,168	21,576	27,040
Cash, cash equivalents and restricted cash	45,978	70,253	88,367	90,874
Cash and cash equivalents, total	74,168	97,311	783,541	144,232
Restricted cash, total	73,850	84,374	106,558	40,425
Cash, cash equivalents and restricted cash, total	$ 148,018	$ 181,685	$ 890,099	$ 184,657