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Other Long-Term Liabilities (Tables)
 9 Months Ended
Sep. 30, 2022
Other Liabilities, Noncurrent [Abstract]  
Schedule of Other Long-term Liabilities
Other long-term liabilities consist of the following as of December 31, 2021 and September 30, 2022 (in thousands):
December 31, 2021September 30, 2022
Contract liabilities, net of current portion$34,704 $34,369 
Asset retirement obligations9,122 7,593 
Other3,263 3,177 
Other long-term liabilities$47,089 $45,139