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Discontinued Operations - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Jun. 30, 2020
Discontinued Operations And Disposal Groups [Abstract]
Accelerated depreciation	$ 27,000			$ 41,000
Accelerated amortization	18,000			24,000
Reduction in cost of service revenue	27,400		$ 6,300	49,300	$ 21,400
Amortization expenses	23,000			30,200
Rental expenses	5,000			15,600
Impairmrnt Charges	0	$ 46,400
Deferred costs						$ 1,000
Impairment of long-lived assets				1,000
2020						28,800
2021	12,566			12,566		138,600
2022	11,278			11,278		118,500
2023	7,276			7,276		92,300
2024	5,521			5,521		59,400
Thereafter	$ 28,956			$ 28,956		$ 259,400

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