Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Statement [Abstract]
Tour revenues	$ 82,410	$ 63,128
Cost of tours	35,871	32,603
Gross profit	46,539	30,525
Operating expenses:
General and administrative	15,050	15,101
Selling and marketing	12,073	10,296
Depreciation and amortization	5,045	3,763
Total operating expenses	32,168	29,160
Operating income	14,371	1,365
Other (expense) income:
Interest expense, net	(2,734)	(2,315)
(Loss) gain on foreign currency	(451)	246
Other income (expense)	8	(263)
Total other expense	(3,177)	(2,332)
Income (loss) before income taxes	11,194	(967)
Income tax expense (benefit)	277	(1,592)
Net income	10,917	625
Net income attributable to noncontrolling interest	121	29
Net income available to common stockholders	$ 10,796	$ 596
Weighted average shares outstanding
Basic	45,274,540	44,707,273
Diluted	45,667,565	45,761,938
Net income per share available to common stockholders
Basic	$ 0.24	$ 0.01
Diluted	$ 0.24	$ 0.01