Commitments and Contingencies (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 03, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Leases [Abstract]
Operating Leases, Rent Expense		$ 12,939	$ 11,166	$ 12,745
Operating Leases, Future Minimum Payments, Due 2017		7,882
Operating Leases, Future Minimum Payments, Due 2018		6,321
Operating Leases, Future Minimum Payments, Due 2019		4,271
Operating Leases, Future Minimum Payments, Due 2020		3,740
Operating Leases, Future Minimum Payments, Due 2021		3,430
Operating Leases, Future Minimum Payments, Due Thereafter		$ 7,811
Subsequent Event [Member] | Contract Matters with Triumph [Member]
Loss Contingencies [Line Items]
Damages awarded	$ 9,212
Interest on judgment	$ 1,415