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Earnings (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income (loss) attributable to Arcos Dorados Holdings Inc. available to common shareholders	$ 129,166	$ 78,810	$ (51,633)
Weighted-average number of common shares outstanding - Basic	210,935,685	210,646,955	210,436,232
Incremental shares from assumed exercise of stock options	0	0	0
Incremental shares from vesting of restricted share units	1,060,726	377,653	160,122
Weighted-average number of common shares outstanding - Diluted	211,996,411	211,024,608	210,596,354
Basic net income (loss) per common share attributable to Arcos Dorados Holdings Inc. (in dollars per share)	$ 0.61	$ 0.37	$ (0.25)
Diluted net income (loss) per common share attributable to Arcos Dorados Holdings Inc. (in dollars per share)	$ 0.61	$ 0.37	$ (0.25)

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