Long-Lived Assets (Details Textual) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Finite Lived Intangible Assets [Line Items]
Impairment charge for write-off of capitalized customer contract costs	$ 10.0
Acquired customer contracts
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average amortization period				100 months
Estimated total amortization expense 2021		$ 7.2
Estimated total amortization expense 2022		7.0
Estimated total amortization expense 2023		5.8
Estimated total amortization expense 2024		5.6
Estimated total amortization expense 2025		5.6
Software
Finite Lived Intangible Assets [Line Items]
Remaining weighted-average amortization period			36 months
Estimated total amortization expense 2021		11.7
Estimated total amortization expense 2022		7.2
Estimated total amortization expense 2023		4.6
Estimated total amortization expense 2024		1.5
Estimated total amortization expense 2025		0.9
Customer contract costs | Cost of revenue
Finite Lived Intangible Assets [Line Items]
Impairment charge for write-off of capitalized customer contract costs		$ 10.3