Business Combinations, Goodwill and Intangible Assets (Composition of Goodwill and Intangible Assets) (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]
Goodwill	$ 82,283	$ 87,609	$ 88,883
Total intangible assets	35,421	35,012
Accumulated amortization	(18,288)	(20,737)
Total intangible assets, net	17,133	14,275
Licenses and Others [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets	4,693	5,320
Non-Compete Agreement[Member]
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets	3,308	2,703
Customer Lists [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets	13,137	13,900
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Amortizable intangible assets	7,200	4,723
Trademarks [Member]
Indefinite-lived Intangible Assets [Line Items]
Intangible assets with indefinite lives	$ 7,083	$ 8,366