VIE Arrangements - Carrying Values of Assets and Liabilities of Subsidiary in Consolidated Balance Sheets (Detail) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016	Mar. 31, 2016	Dec. 31, 2015
Current assets
Cash and cash equivalents	$ 4,006,593	$ 3,393,216	$ 1,441,789	$ 1,196,908
Restricted cash	88,946	105,519
Accounts receivable, net	440,349	499,142
Prepaid expenses and other current assets	271,665	194,465
Total current assets	7,027,889	6,259,796
Other assets	224,536	216,751
Total assets	25,053,726	22,664,076
Current liabilities
Accounts payable	2,075,333	1,860,341
Distributions payable to noncontrolling interests and redeemable noncontrolling interests	300	300
Customer deposits	616,398	663,859
Deferred revenue	841,494	763,126
Total current liabilities	6,245,439	5,827,005
Deferred revenue, net of current portion	955,078	851,790
VIEs [Member]
Current assets
Cash and cash equivalents	49,930	44,091
Restricted cash	20,831	20,916
Accounts receivable, net	20,712	16,023
Rebates receivable	6,313	6,646
Prepaid expenses and other current assets	3,969	7,532
Total current assets	101,755	95,208
Operating lease net	4,756,248	4,618,443
Other assets	34,029	35,826
Total assets	4,892,032	4,749,477
Current liabilities
Accounts payable	31	20
Distributions payable to noncontrolling interests and redeemable noncontrolling interests	20,415	24,085
Accrued and other current liabilities	8,499	8,157
Customer deposits	1,998	1,169
Deferred revenue	19,333	17,114
Current portion of long-term debt	12,437	89,356
Total current liabilities	62,713	139,901
Deferred revenue, net of current portion	195,851	178,783
Long-term debt, net of current portion	568,703	466,741
Other liabilities and deferred costs	112,630	82,917
Total Liabilities	$ 939,897	$ 868,342