Aggregate dividends declared during the period for each share of common stock outstanding.

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Subsequent Events (Details) - USD ($)		12 Months Ended
Subsequent Events (Details) - USD ($)	Feb. 23, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Subsequent Events [Line Items]
Goodwill		$ 168,996,000	$ 80,757,000	$ 78,905,000
Impairment of goodwill		$ 4,289,000	0	0
Dividends declared (in dollars per share)		$ 0.86
Subsequent event
Subsequent Events [Line Items]
Dividends declared (in dollars per share)	$ 0.215
Other
Subsequent Events [Line Items]
Goodwill			14,944,000	$ 13,092,000
Impairment of goodwill		$ 4,289,000	$ 0
Other \| Sass for Vacation Rentals
Subsequent Events [Line Items]
Goodwill		9,799,000
Impairment of goodwill		$ 4,300,000