Goodwill and Intangible Assets (Changes in Carrying Amount of Goodwill) (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Balance, beginning of the period	$ 88,883	$ 92,279
Business acquisition		7,022
Purchase price allocations adjustments	45
Effect of exchange rates changes	1,447	(10,418)
Balance, end of the period	90,375	88,883
Brazil [Member]
Goodwill [Line Items]
Balance, beginning of the period	30,069	32,492
Business acquisition		3,110
Effect of exchange rates changes	287	(5,533)
Balance, end of the period	30,356	30,069
Argentina [Member]
Goodwill [Line Items]
Balance, beginning of the period	6,946	5,761
Business acquisition		3,175
Purchase price allocations adjustments	45
Effect of exchange rates changes		(1,990)
Balance, end of the period	6,991	6,946
Mexico [Member]
Goodwill [Line Items]
Balance, beginning of the period	31,340	30,396
Business acquisition		543
Effect of exchange rates changes	738	401
Balance, end of the period	32,078	31,340
Chile [Member]
Goodwill [Line Items]
Balance, beginning of the period	16,014	18,805
Business acquisition		61
Effect of exchange rates changes	370	(2,852)
Balance, end of the period	16,384	16,014
Colombia [Member]
Goodwill [Line Items]
Balance, beginning of the period	3,339	3,632
Business acquisition		80
Effect of exchange rates changes	44	(373)
Balance, end of the period	3,383	3,339
Other Countries [Member]
Goodwill [Line Items]
Balance, beginning of the period	1,175	1,193
Business acquisition		53
Effect of exchange rates changes	8	(71)
Balance, end of the period	$ 1,183	$ 1,175