Business Acquisitions - Intangible Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 6,296	$ 14,577
Acquired intangible assets, weighted average useful life (in years)	8 years	9 years 2 months 12 days
Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 3,042	$ 7,342
Acquired intangible assets, weighted average useful life (in years)	7 years 6 months	11 years 8 months 12 days
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 851	$ 3,726
Acquired intangible assets, weighted average useful life (in years)	7 years	5 years
Trademarks
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 582	$ 0
Acquired intangible assets, weighted average useful life (in years)	10 years 2 months 12 days	0 days
Airport Contracts
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 4,896
Acquired intangible assets, weighted average useful life (in years)	0 years	9 years
Store Networks
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ 846
Acquired intangible assets, weighted average useful life (in years)	0 years	9 years
Brand
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 78	$ 369
Acquired intangible assets, weighted average useful life (in years)	5 years	4 years
Branch Network [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 1,743	$ 0
Acquired intangible assets, weighted average useful life (in years)	10 years	0 years
Final Allocation Adjustment | Customer relationships
Acquired Finite-Lived Intangible Assets [Line Items]
Total acquired intangible assets, fair value	$ 0	$ (2,602)
Acquired intangible assets, weighted average useful life (in years)	0 days	0 days