Annual report pursuant to Section 13 and 15(d)

SUPPLEMENTAL CASH FLOW INFORMATION - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details)

v3.20.4
SUPPLEMENTAL CASH FLOW INFORMATION - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Supplemental Cash Flow Elements [Abstract]        
Cash and cash equivalents $ 78,297 $ 64,615 $ 133,714  
Non-current restricted cash 3,440 3,867 49,875  
Total cash, cash equivalents and restricted cash in the statement of cash flows $ 81,737 $ 68,482 $ 183,589 $ 128,273