Segment Reporting (Details) $ in Thousands		3 Months Ended		12 Months Ended
		Mar. 31, 2019 USD ($) segment	Mar. 31, 2018 USD ($)	Dec. 31, 2018 segment
Segment Reporting Information [Line Items]
Total revenues		$ 168,844	$ 167,522
Cost of VOIs sold		3,848	1,812
Cost of other fee-based services		22,868	17,411
Cost reimbursements		20,236	16,200
Selling, general and administrative expenses		90,214	93,549
Interest expense		9,506	7,767
Total costs and expenses		146,672	136,739
Income (loss) before non-controlling interest and provision for income taxes		22,172	30,783
Add: Depreciation and amortization		$ 4,486	3,946
Number of reportable segments | segment		2		2
Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total revenues		$ 2,080	1,713
Selling, general and administrative expenses		18,128	21,592
Interest expense		4,244	3,056
Total costs and expenses		22,372	24,648
Income (loss) before non-controlling interest and provision for income taxes		(20,292)	(22,935)
Elimination [Member]
Segment Reporting Information [Line Items]
Total revenues		(1,490)	(1,445)
Net carrying cost of VOI inventory		(7,687)	(2,517)
Cost of other fee-based services		7,687	2,517
Selling, general and administrative expenses		(110)	141
Mortgage servicing expense		(1,380)	(1,586)
Total costs and expenses		(1,490)	(1,445)
Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		121,178	125,719
Cost of VOIs sold		3,848	1,812
Net carrying cost of VOI inventory		7,687	2,517
Cost of other fee-based services		1,210	1,242
Selling, general and administrative expenses		72,196	71,816
Mortgage servicing expense		1,380	1,586
Interest expense		5,262	4,711
Total costs and expenses		91,583	83,684
Income (loss) before non-controlling interest and provision for income taxes		29,595	42,035
Add: Depreciation and amortization		1,536	1,667
Segment Adjusted EBITDA	[1]	31,131	43,702
Resort Operations And Club Management [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		47,076	41,535
Cost of other fee-based services		13,971	13,652
Cost reimbursements		20,236	16,200
Total costs and expenses		34,207	29,852
Income (loss) before non-controlling interest and provision for income taxes		12,869	11,683
Add: Depreciation and amortization		365	395
Segment Adjusted EBITDA	[1]	13,234	12,078
Sales of VOIs [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	51,731	56,141
Sales of VOIs [Member] | Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		51,731
Fee-Based Sales Commission Revenue [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	45,212	45,854
Fee-Based Sales Commission Revenue [Member] | Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		45,212	45,854
Other Fee-Based Services Revenue [Member]
Segment Reporting Information [Line Items]
Total revenues		29,568	28,024
Other Fee-Based Services Revenue [Member] | Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		2,728	2,689
Other Fee-Based Services Revenue [Member] | Resort Operations And Club Management [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		26,840	25,335
Cost Reimbursements [Member]
Segment Reporting Information [Line Items]
Total revenues	[3]	20,236	16,200
Cost Reimbursements [Member] | Resort Operations And Club Management [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		20,236	16,200
Mortgage Servicing Revenue [Member] | Elimination [Member]
Segment Reporting Information [Line Items]
Total revenues		(1,490)	(1,445)
Mortgage Servicing Revenue [Member] | Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		1,490	1,445
Interest Income [Member]
Segment Reporting Information [Line Items]
Total revenues	[2]	22,008	21,122
Interest Income [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total revenues		1,991	1,532
Interest Income [Member] | Sales Of VOIs And Financing [Member] | Reportable Segments [Member]
Segment Reporting Information [Line Items]
Total revenues		20,017	19,590
Other Income, Net [Member]
Segment Reporting Information [Line Items]
Total revenues		89	181
Other Income, Net [Member] | Corporate And Other [Member]
Segment Reporting Information [Line Items]
Total revenues		$ 89	$ 181

[1] See Management's Discussion and Analysis of Financial Condition and Results of Operations for information regarding Adjusted EBITDA, including how we define Adjusted EBITDA and a reconciliation of Adjusted EBITDA to net income.

[2] Included in our sales of VOIs and financing segment described in Note 13: Segment Reporting.

[3] Included in our resort operations and club management segment described in Note 13: Segment Reporting.