Cash, Cash Equivalents and Restricted Cash - Narrative (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current restricted cash	$ 16,400	$ 32,800
Revolving Credit Facility
Restricted Cash and Cash Equivalents Items [Line Items]
Repayments of long-term lines of credit	220,000
Secured Debt
Restricted Cash and Cash Equivalents Items [Line Items]
Non-current restricted cash	$ 16,000