Other Long-Term Liabilities - Schedule of Other Long-term Liabilities (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Other Liabilities Noncurrent [Abstract]
Accrued warranty reserve	$ 590,211	$ 547,125
Build-to-suit lease liability		1,662,017
Operating lease right-of-use liabilities	1,000,886
Deferred rent expense		59,252
Financing obligation	45,566	50,383
Sales return reserve	524,222	84,143
Other noncurrent liabilities	314,250	307,483
Total other long-term liabilities	$ 2,475,135	$ 2,710,403