Accounts Payable and Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Outstanding checks in excess of cash	$ 8,879	$ 12,269
Accounts payable, trade	810,034	729,415
Accrued expenses	363,919	333,942
Product warranties	39,035	46,347
Accrued interest	22,363	20,396
Accrued compensation and benefits	207,442	193,213
Total accounts payable and accrued expenses	$ 1,451,672	$ 1,335,582