Financing Receivables and Payables - Additional Information (Detail) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Financing Receivables [Line Items]
Other current liabilities	$ 377,989	$ 314,219
Other Current Assets
Financing Receivables [Line Items]
Other current assets	209,700	183,300
Other Current Liabilities
Financing Receivables [Line Items]
Other current liabilities	$ 100,500	$ 100,300