Accounts Payable and Accrued Expenses (Components of accounts payable and accrued expenses) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Payables and Accruals [Abstract]
Outstanding checks in excess of cash	$ 14,023	$ 16,083
Accounts payable, trade	696,974	622,360
Accrued expenses	293,867	260,578
Product warranties	35,516	29,350
Accrued interest	34,623	28,365
Accrued compensation and benefits	181,022	138,683
Total accounts payable and accrued expenses	$ 1,256,025	$ 1,095,419