Fair Value Measurements - Schedule of Fair Value of Assets Measured on Non-recurring Basis and Related Impairment Charges (Parenthetical) (Detail)	3 Months Ended	12 Months Ended
	Sep. 30, 2015 Restaurant	Dec. 31, 2017 Hotel	Dec. 31, 2016 Hotel	Dec. 31, 2015 Hotel
Fair Value Disclosures [Abstract]
Number of hotels held for sale		3	5	13
Number of restaurants parcel held for sale | Restaurant	1
Number of additional hotels held for sale			5