Derivative Financial Instruments (Narrative) (Details) - USD ($)	3 Months Ended
Jun. 30, 2018	Sep. 29, 2018	Dec. 30, 2017
Derivative Financial Instruments [Abstract]
Derivative outstanding		$ 0	$ 0
Notional amount	$ 105,000,000
Derivative gain	$ 739,000

Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958

Name:	us-gaap_DerivativeAssetsLiabilitiesAtFairValueNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant