Subsequent Event (Details) - USD ($) $ in Thousands		6 Months Ended
Jul. 01, 2018	Jun. 30, 2018
Subsequent Event [Abstract]
Payments to Acquire Additional Interest in Subsidiaries	$ 7,000
Acquired Noncontrolling Interest Redeemable	$ 10,000	$ 3,428

The cash outflow associated with the purchase of noncontrolling interest during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3213-108585

Name:	us-gaap_PaymentsToAcquireAdditionalInterestInSubsidiaries
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration