Summary of Significant Accounting Policies - Accrued Expenses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Accounting Policies [Abstract]
Accrued payroll and related expenses	$ 67,935	$ 74,505
Accrued customer rebates	48,590	49,923
Customer Deposits, Current	31,069	41,735
Accrued warranty	52,834	40,851
Accrued Professional Fees, Current	18,250	16,605
Accrued product liability and workers compensation	11,976	11,417
Accrued Sales Commission, Current	11,035	12,834
midd_AccruedProductRecall	6,068	7,003
Accured Restructuring Liabilities, Current	1,715	2,295
Restructuring Charges	19,951	10,524	$ 28,754
Sales and Excise Tax Payable, Current	20,881	13,565
Other accrued expenses	51,818	64,872
Accrued expenses	$ 322,171	$ 335,605