Business Acquisitions - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 6,296
Acquired intangible assets, weighted average useful life (in years)	0 years	8 years
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 3,042
Acquired intangible assets, weighted average useful life (in years)	0 years	7 years 6 months
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 851
Acquired intangible assets, weighted average useful life (in years)	0 years	7 years
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 582
Acquired intangible assets, weighted average useful life (in years)	0 years	10 years 2 months 12 days
Airport Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 0
Acquired intangible assets, weighted average useful life (in years)	0 years	0 years
Store Networks
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 0
Acquired intangible assets, weighted average useful life (in years)	0 years	0 years
Brand
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 78
Acquired intangible assets, weighted average useful life (in years)	0 years	5 years
Branch network
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 1,743
Acquired intangible assets, weighted average useful life (in years)	0 years	10 years
Final Allocation Adjustment | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 0
Acquired intangible assets, weighted average useful life (in years)	0 years	0 years