Consolidated Statement of Equity (Parenthetical) - $ / shares	6 Months Ended
Jun. 29, 2019	Jun. 30, 2018
Consolidated Condensed Statements of Equity (Parenthetical) [Abstract]
Conversion of Class B shares (in shares)	18	31,800
Restricted stock issuances (in shares)	230,624	211,328
Dividends declared (in dollars per share)	$ 0.1800	$ 0.1525

Number of shares issued during the period related to Restricted Stock Awards, net of any shares forfeited.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration