Inventories, net and Notes Payable - Floor Plan, net - Inventories (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Inventories
Inventories	$ 909,254	$ 802,379	$ 908,705	$ 1,001,633	$ 861,847	$ 774,059	$ 821,204	$ 829,331	$ 670,893
New RV vehicles
Inventories
Inventories	727,634				618,236
Used RV vehicles
Inventories
Inventories	78,787				159,552
Parts, accessories and miscellaneous
Inventories
Inventories	$ 102,833				$ 84,059