Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2018

Commitments and Contingencies [Abstract]

Annual Minimum Lease Payments

For the year ended December 31,	Capital Leases		Operating Leases
2019	$	883	$	237,730
2020		482		239,208
2021		303		241,090
2022		86		242,320
2023		—		243,476
Total minimum lease payments		1,754
Less: amount representing interest		(83)
Present value of future payments		1,671
Less: current obligations		(860)
Long-term obligations	$	811

Annual Minimum Tower Lease Income

For the year ended December 31,	(in thousands)
2019	$	1,529,902
2020		1,326,108
2021		1,075,675
2022		815,219
2023		598,987