Commitments and Contingencies (Details) $ in Thousands, £ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 GBP (£)
Commitments and Contingencies
Cost of revenues	$ 692,651	$ 884,979	$ 897,783
Gain contingency, unrecorded amount	18,000			£ 13
Asset retirement obligations	63,490	61,195	61,223
Payment of contingent consideration	5,180	0	0
Acquisition-related contingent consideration accrual	9,490	16,851
Material purchase commitment	7,900
ATM operating revenues
Commitments and Contingencies
Cost of revenues	652,906	$ 830,359	$ 855,948
ATM operating revenues | Reduction in Taxes
Commitments and Contingencies
Cost of revenues	35,100
ATM and equipment
Commitments and Contingencies
Material purchase commitment	15,700
Minimum service requirements
Commitments and Contingencies
Material purchase commitment	$ 1,500
Purchase commitment remaining period	6 years