Property and Equipment - Capitalized Software Development Costs (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Property, Plant and Equipment [Abstract]
Capitalized internal use software development costs	$ 12,000	$ 7,000
Stock-based compensation capitalized in software development costs	3,418	1,623
Amortization of capitalized software development costs	$ 4,600	$ 3,800

Additions made to capitalized computer software costs during the period.

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Amount of expense for amortization of capitalized computer software costs.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
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Amount of cost capitalized for award under share-based payment arrangement.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
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