Depreciation and Amortization (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Reduction in Unearned Income	$ 42,515		$ 45,953
Depreciation Expense Offset By Government Reimbursement	(34,379)	$ (28,462)
Depreciation Expense Reimbursement [Member]
Property, Plant and Equipment [Line Items]
Reimbursement Revenue	63,500
Reduction in Unearned Income	3,400	4,700
Depreciation Expense Offset By Government Reimbursement	$ (3,400)	$ (4,700)