Description of Business and Summary of Significant Accounting Policies - Additional Information (Details)	3 Months Ended												12 Months Ended
	Dec. 31, 2020 USD ($) product_service_group	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2020 USD ($) product_service_group	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2009 USD ($)
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Impairment of intangible asset													$ 6,168,000	$ 0	$ 0
Operating revenue	$ 222,116,000	$ 154,305,000	$ 111,312,000	$ 137,876,000	$ 146,183,000	$ 147,233,000	$ 144,275,000	$ 142,924,000	$ 136,327,000	$ 128,643,000	$ 124,626,000	$ 108,230,000	625,609,000	580,615,000	497,826,000
Total intangibles	$ 134,806,000				121,575,000								134,806,000	121,575,000
Amortization expense, acquired intangible assets													$ 9,500,000	10,200,000	7,500,000
Number of product/service channels | product_service_group	3												3
Customer relationships | E-Z Data
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Indefinite-lived intangible assets acquired																$ 14,200,000
EbixHealth JV
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Impairment of intangible asset													$ 6,200,000
Customer relationships
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	$ 96,616,000				83,012,000								$ 96,616,000	83,012,000
Customer relationships | Minimum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													7 years
Customer relationships | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													20 years
Customer relationships | E-Z Data
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life		15 years
Total intangibles		$ 14,200,000
Amortization expense, acquired intangible assets		$ 237,000
Customer relationships | EbixHealth JV
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													10 years
Developed technology
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	19,867,000				19,979,000								$ 19,867,000	19,979,000
Developed technology | Minimum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													3 years
Developed technology | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													12 years
Airport Contracts
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	4,523,000				4,635,000								$ 4,523,000	4,635,000
Airport Contracts | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													9 years
Store Networks
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	2,440,000				2,500,000								$ 2,440,000	2,500,000
Store Networks | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													5 years
Dealer networks
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	6,653,000				6,726,000								$ 6,653,000	6,726,000
Dealer networks | Minimum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													15 years
Dealer networks | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													20 years
Brand
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	896,000				918,000								$ 896,000	918,000
Brand | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													15 years
Trademarks
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	2,700,000				2,689,000								$ 2,700,000	2,689,000
Trademarks | Minimum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													3 years
Trademarks | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													15 years
Non-compete agreements
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	759,000				764,000								$ 759,000	764,000
Non-compete agreements | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													5 years
Database
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Total intangibles	$ 212,000				$ 212,000								$ 212,000	212,000
Database | Maximum
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Finite-lived intangible asset, useful life													10 years
India
Finite-Lived and Indefinite Lived Intangible Lived Assets [Line Items]
Operating revenue													$ 378,660,000	$ 300,678,000	$ 196,372,000