Shareholders' Equity - Ordinary Shares Activity (Details) - shares	6 Months Ended
Jun. 28, 2019	Jun. 29, 2018
Stockholders' Equity Note [Abstract]
Stock option exercises (shares)	18,250	36,500
Restricted stock grants (shares)	33,721	21,304
Restricted and performance stock units (shares)	172,395	180,254
Ordinary shares repurchased and retired (shares)	(365,569)	(218,232)

Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Number, after forfeiture, of shares or units issued under share-based payment arrangement. Excludes shares or units issued under employee stock ownership plan (ESOP).

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Number of share options (or share units) exercised during the current period.

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Number of shares that have been repurchased and retired during the period.

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