Debt and Finance Lease Obligations (Summarizes Securitized Financings) (Details) - USD ($) $ in Thousands		3 Months Ended
		Jun. 29, 2019	Mar. 30, 2019	Jun. 30, 2018	Mar. 31, 2018
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate During Period		4.91%
Remaining Borrowing Capacity		$ 5,000
Maximum Advance under Secured Credit Facility		80.00%
Line of Credit Facility, Frequency of Payment and Payment Terms		20 or 25 year amortization period with a balloon payment due upon maturity
Acquired Securitized Financings
Securitized financings - contractual amount		$ 17,950	$ 18,855
Purchase Discount
Accretable yield		(206)	(491)	$ (2,697)	$ (3,515)
Non-accretable difference	[1]	0	0
Total securitized financings, net		$ 17,744	$ 18,364

[1] There is no non-accretable difference, as the contractual payments on acquired securitized financings are determined by the cash collections from the underlying loans.