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Related Party Transactions - Relationship with Apollo Global Management, LLC (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) director	Sep. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)
Related-Party Transactions
Related party expense	$ 1,405	$ 759	$ 3,454	$ 3,267
Finance lease liability	39,331		$ 39,331
Apollo
Related-Party Transactions
Number of directors right to designate \| director			2
Management Holdings \| Master Service Agreement
Related-Party Transactions
Revenue from related parties	100	100	$ 400	500
Caesars \| Master Service Agreement
Related-Party Transactions
Revenue from related parties	1,100	1,100	3,300	3,100
ADT LLC \| Master Service Agreement
Related-Party Transactions
Revenue from related parties	300	200	900	400
Diamond Resorts Centralized Services \| Master Service Agreement
Related-Party Transactions
Revenue from related parties	1,400	700	4,000	4,900
Related party cost of revenue			100	100
Presidio Capital \| Master Lease Agreement
Related-Party Transactions
Finance lease liability	1,000		1,000		$ 1,000
Novitex Solutions \| Presidio Group \| Master Service Agreement
Related-Party Transactions
Related party expense	$ 400	$ 200	$ 700	$ 500