Description of Business and Summary of Significant Accounting Policies - Schedule of Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Total intangibles	$ 134,806	$ 121,575
Accumulated amortization	(83,926)	(74,620)
Estimated future amortization expense	50,880	46,955
Customer/territorial relationships
Finite-Lived Intangible Assets [Line Items]
Total intangibles	96,616	83,012
Developed technology
Finite-Lived Intangible Assets [Line Items]
Total intangibles	19,867	19,979
Dealer networks
Finite-Lived Intangible Assets [Line Items]
Total intangibles	6,653	6,726
Airport Contracts
Finite-Lived Intangible Assets [Line Items]
Total intangibles	4,523	4,635
Store Networks
Finite-Lived Intangible Assets [Line Items]
Total intangibles	2,440	2,500
Trademarks
Finite-Lived Intangible Assets [Line Items]
Total intangibles	2,700	2,689
Brand
Finite-Lived Intangible Assets [Line Items]
Total intangibles	896	918
Non-compete agreements
Finite-Lived Intangible Assets [Line Items]
Total intangibles	759	764
Backlog
Finite-Lived Intangible Assets [Line Items]
Total intangibles	140	140
Database
Finite-Lived Intangible Assets [Line Items]
Total intangibles	212	212
Customer/territorial relationships
Finite-Lived Intangible Assets [Line Items]
Customer/territorial relationships	$ 21,647	$ 42,055