Consolidated Statements of Operations - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Tour revenues	$ 309,734	$ 266,504	$ 242,346
Cost of tours	153,743	135,526	118,977
Gross profit	155,991	130,978	123,369
Operating expenses:
General and administrative	62,898	60,529	51,896
Selling and marketing	46,987	42,354	39,072
Depreciation and amortization	20,768	17,351	18,420
Total operating expenses	130,653	120,234	109,388
Operating income	25,338	10,744	13,981
Other (expense) income:
Interest expense, net	(10,830)	(9,736)	(10,146)
(Loss) gain on foreign currency	(2,175)	1,144	(720)
Other expense	(165)	(133)	(1,173)
Gain (loss) on transfer of assets		454	(83)
Total other expense	(13,170)	(8,271)	(12,122)
Income before income taxes	12,168	2,473	1,859
Income tax expense (benefit)	616	10,002	(3,200)
Net income (loss)	11,552	(7,529)	5,059
Net income attributable to noncontrolling interest	200	1,132	195
Net income (loss) available to common stockholders	$ 11,352	$ (8,661)	$ 4,864
Weighted average shares outstanding
Basic (in shares)	45,378,188	44,576,912	45,649,971
Diluted (in shares)	46,340,054	44,576,912	46,456,921
Net income (loss) per share available to common stockholders
Basic (in dollars per share)	$ 0.25	$ (0.19)	$ 0.11
Diluted (in dollars per share)	$ 0.24	$ (0.19)	$ 0.10