Summary of Significant Accounting Policies - Impairment of Long-lived assets (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Impairment of long-lived assets	$ 356,418
T1
Impairment of long-lived assets	48,120
D1
Impairment of long-lived assets	55,000
NBIoT capitalized costs
Impairment of long-lived assets	253,000
NBIoT capitalized costs | Construction in progress
Impairment of long-lived assets	226,742
NBIoT capitalized costs | Operating lease assets
Impairment of long-lived assets	$ 26,556