Annual report pursuant to Section 13 and 15(d)

Revenue From Contracts With Customers (Revenue Disaggregation) (Details)

v3.10.0.1
Revenue From Contracts With Customers (Revenue Disaggregation) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disaggregation of Revenue [Line Items]                      
Total revenues $ 173,656 $ 202,205 $ 194,937 $ 167,522 $ 177,893 $ 195,209 $ 187,383 $ 162,567 $ 738,320 $ 723,052 $ 719,941
Sales of VOIs [Member]                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 254,225 242,017 273,873
Fee-Based Sales Commission Revenue [Member]                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 216,422 229,389 201,829
Reimbursement Revenue [Member]                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 62,534 52,639 49,557
Interest Income [Member]                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 85,914 86,876 89,510
Other Income, Net [Member]                      
Disaggregation of Revenue [Line Items]                      
Total revenues                 $ 1,201 $ 312 $ 1,724