Goodwill, Finite-Lived, and Indefinite-Lived Intangibles - Finite-Lived and Indefinite-Lived Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2009
Finite-lived intangible assets:
Finite-lived intangible assets, gross	$ 140,359	$ 134,806		$ 140,359
Accumulated amortization	(89,049)	(83,926)		(89,049)
Finite-lived intangibles, net	51,310	50,880		51,310
Indefinite-lived intangibles:
Amortization of acquired intangible assets	2,800		$ 2,200	5,200	$ 4,700
EbixHealth JV
Indefinite-lived intangibles:
Impairment of intangible asset		6,200
Customer relationships
Finite-lived intangible assets:
Finite-lived intangible assets, gross	102,009	96,616		$ 102,009
Customer relationships | EbixHealth JV
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				10 years
Developed technology
Finite-lived intangible assets:
Finite-lived intangible assets, gross	20,300	19,867		$ 20,300
Dealer network
Finite-lived intangible assets:
Finite-lived intangible assets, gross	6,544	6,653		6,544
Airport contracts
Finite-lived intangible assets:
Finite-lived intangible assets, gross	4,446	4,523		$ 4,446
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				9 years
Trademarks
Finite-lived intangible assets:
Finite-lived intangible assets, gross	2,705	2,700		$ 2,705
Store networks
Finite-lived intangible assets:
Finite-lived intangible assets, gross	2,398	2,440		$ 2,398
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				5 years
Brand
Finite-lived intangible assets:
Finite-lived intangible assets, gross	881	896		$ 881
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				15 years
Non-compete agreements
Finite-lived intangible assets:
Finite-lived intangible assets, gross	724	759		$ 724
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				5 years
Database
Finite-lived intangible assets:
Finite-lived intangible assets, gross	212	212		$ 212
Indefinite-lived intangibles:
Finite-lived intangible asset, useful life				10 years
Backlog
Finite-lived intangible assets:
Finite-lived intangible assets, gross	140	140		$ 140
Customer relationships
Indefinite-lived intangibles:
Customer/territorial relationships	$ 16,647	$ 21,647		16,647
Customer relationships | E-Z Data
Indefinite-lived intangibles:
Indefinite-lived intangible assets recognized						$ 14,200
Reclassified intangible as finite-lived				$ 14,200
Finite-lived intangible asset, useful life				15 years