Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Income Taxes [Line Items]
Income taxes receivable	$ 55,812	$ 10,735
Accounts payable and accrued liabilities	$ 433,666	$ 507,701
Effective Income Tax Rate	57.30%
CableONE [Member]
Income Taxes [Line Items]
Income taxes receivable	$ 20,700
Accounts payable and accrued liabilities	$ 20,700