v3.19.2

Contract assets and contract liabilities (Details) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Contract assets, net
Balance at December 31, 2018		$ 468
Balance at March 31, 2019	$ 756	756
Change		288
Contract liabilities, net
Balance at December 31, 2018		217,733
Balance at June 30, 2019	237,109	237,109
Change		19,376
Contract liability and performance obligations included in revenue
Amounts included in the beginning of period contract liability balance	22,629	51,500
Amounts associated with performance obligations satisfied in previous periods	7	$ 301
Revenue performance obligations
Practical expedient of remaining performance obligations		true
DAS
Revenue performance obligations
Remaining service performance obligations	$ 221,374	$ 221,374
DAS | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 | Maximum
Revenue performance obligations
Remaining duration of contracts	15 years	15 years
Wholesale-Wi-Fi
Revenue performance obligations
Remaining service performance obligations	$ 10,598	$ 10,598
Wholesale-Wi-Fi | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-01 | Maximum
Revenue performance obligations
Remaining duration of contracts	15 years	15 years

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