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Other Assets and Accrued Liabilities - Long Term Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Other Liabilities Disclosure [Abstract]    
Noncurrent portion of deferred lease revenue $ 16,992 $ 12,449
FCC spectrum license obligations 1,696 1,699
Noncurrent portion of financing leases 1,548 1,591
Interest rate swaps 2,527 0
Other 1,133 1,251
Other liabilities $ 23,896 $ 16,990