Other Long-Term Liabilities (Tables)

3 Months Ended

Mar. 31, 2021

Other Liabilities, Noncurrent [Abstract]

Schedule of other long-term liabilities

Other long-term liabilities consist of the following as of December 31, 2020 and March 31, 2021 (in thousands):

	December 31, 2020		March 31, 2021
Contract liabilities, net of current portion	$	34,866	$	33,217
Asset retirement obligations	7,647		8,623
Deferred payments related to acquisitions	715		—
Other	2,827		2,877
Other long-term liabilities	$	46,055	$	44,717