Supplemental Balance Sheet Information (Tables)

12 Months Ended

Dec. 31, 2018

Disclosure Text Block Supplement [Abstract]

Balance Sheet Information

The following table shows selected balance sheet information at December 31, 2018 and 2017:

	December 31,
	2018		2017
Other assets:
Long-term investments	$	311,417	$	435,612
Deferred marketing costs	—		35,668
Contract assets and cost to obtain a contract	42,287		—
Other	59,535		69,471
Total	$	413,239	$	540,751
Accounts payable and accrued liabilities:
Accounts payable	$	285,592	$	284,857
Customer deposits	700,397		693,005
Employee related liabilities	230,044		251,545
Other	185,602		229,447
Total	$	1,401,635	$	1,458,854