Segment Information (Tables)

3 Months Ended

Mar. 31, 2018

Segment Information [Abstract]

Summary of operating results for the business segments

	For the three months ended  March 31,
(In thousands)	2018		2017		Change		%
Tour revenues:	(unaudited)
Lindblad	$	70,453	$	53,202	$	17,251		32	%
Natural Habitat		11,957		9,926		2,031		20	%
Total tour revenues	$	82,410	$	63,128	$	19,282		31	%
Operating income:
Lindblad	$	13,439	$	1,266	$	12,173		NM
Natural Habitat		932		99		833		NM
Total operating income	$	14,371	$	1,365	$	13,006		NM