Selected Quarterly Financial Data - (Unaudited) (Details) - USD ($)	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	Feb. 05, 2019
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 244,979,000	$ 291,490,000	$ 295,441,000	$ 209,394,000	$ 221,483,000	$ 269,930,000	$ 261,016,000	$ 188,868,000	$ 1,041,304,000	$ 941,297,000	$ 807,909,000
Operating income	52,041,000	111,168,000	109,016,000	46,249,000	64,648,000	93,063,000	86,539,000	45,403,000	318,474,000	289,653,000	187,055,000
Income before income taxes	40,330,000	102,443,000	100,024,000	30,461,000	54,781,000	83,743,000	76,414,000	34,279,000	273,258,000	249,217,000	148,140,000
Net income	$ 31,471,000	$ 79,959,000	$ 79,839,000	$ 25,086,000	$ (9,816,000)	$ 57,189,000	$ 50,685,000	$ 24,269,000	$ 216,355,000	$ 122,327,000	$ 106,712,000
Earnings per share:
Basic (in dollars per share)	$ 0.56	$ 1.42	$ 1.41	$ 0.44	$ (0.17)	$ 1.01	$ 0.90	$ 0.43	$ 3.83	$ 2.16	$ 1.90
Diluted (in dollars per share)	$ 0.56	$ 1.41	$ 1.40	$ 0.44	$ (0.17)	$ 1.01	$ 0.89	$ 0.43	$ 3.80	$ 2.15	$ 1.89
Effect of Fourth Quarter Events [Line Items]
Operating income (loss)	$ 52,041,000	$ 111,168,000	$ 109,016,000	$ 46,249,000	$ 64,648,000	$ 93,063,000	$ 86,539,000	$ 45,403,000	$ 318,474,000	$ 289,653,000	$ 187,055,000
Impairment of goodwill									4,289,000	0	$ 0
Officers' compensation						12,000,000
Impairment of lease acquisition costs						(1,200,000)
Tax Cuts and Jobs Act of 2017, income tax expense					(48,500,000)
Other
Effect of Fourth Quarter Events [Line Items]
Impairment of goodwill									4,289,000	$ 0
Other | Sass for Vacation Rentals
Effect of Fourth Quarter Events [Line Items]
Impairment of goodwill									$ 4,300,000
WoodSpring
Effect of Fourth Quarter Events [Line Items]
Acquisition transaction and integration costs	1,300,000	600,000	800,000	4,200,000
Marketing and reservation system
Quarterly Financial Information Disclosure [Abstract]
Operating income	(13,200,000)	14,000,000	20,800,000	(12,200,000)	3,400,000	14,200,000	11,700,000	(9,100,000)
Effect of Fourth Quarter Events [Line Items]
Operating income (loss)	$ (13,200,000)	$ 14,000,000	$ 20,800,000	$ (12,200,000)	$ 3,400,000	$ 14,200,000	$ 11,700,000	$ (9,100,000)
Senior and Subordinated Tranches | Subsequent event
Effect of Fourth Quarter Events [Line Items]
Loan reserves on impaired loans												$ 2,800,000