Intangible assets and goodwill, net - Narrative (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($) segment reporting_unit	Jun. 30, 2019 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Amortization of intangible assets	$ 9,300,000	$ 9,100,000	$ 18,700,000	$ 18,100,000
Number of operating segments | segment			1
Number of reporting units | reporting_unit			1
Goodwill impairment			$ 0		$ 0
Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Software development costs capitalized	1,300,000	2,200,000	3,300,000	4,600,000
Amortization expense of capitalized software development costs	7,400,000	6,900,000	14,700,000	13,800,000
Costs related to stock based compensation	$ 100,000	$ 0.0	$ 200,000	$ 100,000
Minimum | Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			3 years
Minimum | Acquired Technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			3 years
Minimum | Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			10 years
Maximum | Capitalized Software Development Costs
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			6 years
Maximum | Acquired Technology
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			8 years
Maximum | Patents
Finite-Lived Intangible Assets [Line Items]
Intangible assets amortization period (in years)			17 years