Goodwill and Intangible Assets - Narrative (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($) reporting_unit operating_segment	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2019 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 462,274,000			$ 462,023,000
Number of operating segments | operating_segment	1
Number of reporting units | reporting_unit	1
Impairment of goodwill	$ 0		$ 0
Amortization of acquired intangibles	4,491,000	$ 1,215,000
Gross capitalized software costs	253,279,000			252,992,000
Amortization of capitalized software development costs	200,000	200,000
Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Gross capitalized software costs	4,438,000			4,151,000
Amortization of capitalized software development costs		200,000
Cost of revenues
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	5,500,000	1,600,000
Operating expenses
Finite-Lived Intangible Assets [Line Items]
Amortization of acquired intangibles	$ 4,500,000	$ 1,200,000
Minimum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	2 years
Maximum
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	10 years
Maximum | Capitalized software development costs
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	5 years
PrecisionLender
Finite-Lived Intangible Assets [Line Items]
Goodwill				$ 354,200,000
Cloud Lending, Inc.
Finite-Lived Intangible Assets [Line Items]
Goodwill			77,000,000.0
Gro Solutions
Finite-Lived Intangible Assets [Line Items]
Goodwill			$ 17,800,000