Significant Accounting Policies (Revenue Disaggregation) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Total revenues		$ 202,205	$ 195,209	$ 564,662	$ 544,915
Sales of VOIs [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	70,698	62,453	195,412	176,094
Fee-Based Sales Commission Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]	61,641	69,977	167,581	179,046
Resort And Club Management Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]	25,744	23,170	75,257	67,857
Cost Reimbursements [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]	16,900	14,097	47,157	40,660
Title Fees [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	3,491	2,373	9,355	10,927
Other Revenue [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[2]	1,822	1,843	4,860	4,658
Revenue From Customers [Member]
Disaggregation of Revenue [Line Items]
Total revenues		180,296	173,913	499,622	479,242
Interest Income [Member]
Disaggregation of Revenue [Line Items]
Total revenues	[1]	21,531	$ 21,296	63,771	$ 65,673
Other Income, Net [Member]
Disaggregation of Revenue [Line Items]
Total revenues		$ 378		$ 1,269

[1] Included in our sales of VOIs and financing segment described in Note 11.

[2] Included in our resort operations and club management segment described in Note 11.