Prepaid Expenses and Other Assets, Net (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Furniture, fixtures and other long-lived assets, net	$ 36,717	$ 39,686
Note receivable	2,046	19,912
Prepaid expenses & acquisition deposits	33,912	55,108
Total prepaid expenses and other assets, net	72,675	$ 114,706
Proceeds received from repayment of note receivable (Note 3)	15,100
Notes receivable, valuation allowance	$ 2,900