Supplemental Cash Flow Information - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Continuing operations
Cash and cash equivalents	$ 96,923	$ 44,226	$ 672,078	$ 80,398
Restricted cash	129,052	67,206	85,473	13,385
Cash, cash equivalents and restricted cash	225,975	111,432	757,551	93,783
Discontinued operations
Cash and cash equivalents	17,354	53,085	58,879	63,834
Restricted cash	974	17,168	20,211	27,040
Cash, cash equivalents and restricted cash	18,328	70,253	79,090	90,874
Cash and cash equivalents, total	114,277	97,311	730,957	144,232
Restricted cash, total	130,026	84,374	105,684	40,425
Cash, cash equivalents and restricted cash, total	$ 244,303	$ 181,685	$ 836,641	$ 184,657