VIE Arrangements - Carrying Values of Assets and Liabilities of Subsidiary in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Assets
Cash and cash equivalents	$ 3,035,924	$ 3,393,216	$ 3,246,301	$ 1,196,908
Restricted cash	118,369	105,519
Accounts receivable, net	453,539	499,142
Prepaid expenses and other current assets	313,501	194,465
Total current assets	6,359,444	6,259,796
Other assets	209,986	216,751
Total assets	26,043,705	22,664,076
Liabilities
Accounts payable	2,359,316	1,860,341
Distributions payable to noncontrolling interests and redeemable noncontrolling interests	12,400	300
Customer deposits	603,540	663,859
Deferred revenue	913,398	763,126
Total current liabilities	6,546,355	5,827,005
Deferred revenue, net of current portion	1,035,579	851,790
VIEs [Member]
Assets
Cash and cash equivalents	62,909	44,091
Restricted cash	21,810	20,916
Accounts receivable, net	34,810	16,023
Rebates receivable	7,502	6,646
Prepaid expenses and other current assets	4,339	7,532
Total current assets	131,370	95,208
Operating lease net	5,000,795	4,618,443
Other assets	41,530	35,826
Total assets	5,173,695	4,749,477
Liabilities
Accounts payable	31	20
Distributions payable to noncontrolling interests and redeemable noncontrolling interests	18,263	24,085
Accrued and other current liabilities	10,370	8,157
Customer deposits	2,402	1,169
Deferred revenue	37,160	17,114
Current portion of long-term debt	12,466	89,356
Total current liabilities	80,692	139,901
Deferred revenue, net of current portion	255,578	178,783
Long-term debt, net of current portion	602,167	466,741
Other liabilities and deferred costs	63,622	82,917
Total liabilities	$ 1,002,059	$ 868,342