Derivative Financial Instruments (Schedule of Offsetting of Derivative Assets) (Details) - USD ($) $ in Thousands	Sep. 29, 2019	Dec. 31, 2018
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	$ 1,097	$ 786
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented on the Condensed Consolidated Balance Sheets	1,097	786
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Financial Instruments	(208)	(362)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	889	424
J.P. Morgan Chase
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	128
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0
Net Amounts Of Assets Presented on the Condensed Consolidated Balance Sheets	128
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Financial Instruments	(31)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0
Net Amount	97
Bank of America
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	0	323
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented on the Condensed Consolidated Balance Sheets	0	323
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Financial Instruments	(2)	(64)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	(2)	259
Wells Fargo
Offsetting of Derivative Assets [Line Items]
Gross Amounts of Recognized Assets	969	463
Gross Amounts Offset on the Condensed Consolidated Balance Sheets	0	0
Net Amounts Of Assets Presented on the Condensed Consolidated Balance Sheets	969	463
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Financial Instruments	(175)	(298)
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheets: Cash Collateral Pledged	0	0
Net Amount	$ 794	$ 165