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Other Assets and Accrued Liabilities - Long-Term Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]      
Broadband contract acquisition costs $ 5,645 $ 5,050  
Prepaid expenses and other 4,653 1,398  
Deferred charges and other assets $ 10,298 $ 6,448 $ 5,918