Long-lived Assets and Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Goodwill [Line Items]
Long-lived asset	$ 1,173,816		$ 1,138,370
Impairment of long-lived assets	7,304	$ 0
Impairment of goodwill	3,097	$ 0
Goodwill	165,623		168,996
Other Segments
Goodwill [Line Items]
Impairment of goodwill	3,097
Goodwill	6,426		$ 9,799
Other Segments | SaaS for Vacation Rentals
Goodwill [Line Items]
Impairment of long-lived assets	7,300
Impairment of goodwill	3,100
Goodwill	6,400
Intangible Assets | Other Segments | SaaS for Vacation Rentals
Goodwill [Line Items]
Long-lived asset	4,300
Operating Lease Right-of-use Asset | Other Segments | SaaS for Vacation Rentals
Goodwill [Line Items]
Long-lived asset	1,700
Property, Plant and Equipment | Other Segments | SaaS for Vacation Rentals
Goodwill [Line Items]
Long-lived asset	$ 1,300