Shareholders' Equity - Performance Shares Outstanding (Details) - Performance Shares	12 Months Ended
	Jan. 03, 2021 $ / shares shares
Shares
Outstanding at beginning of year (in shares) | shares	512,000
Granted (in shares) | shares	263,700
Vested (in shares) | shares	(164,300)
Forfeited or cancelled (in shares) | shares	(206,100)
Outstanding at end of year (in shares) | shares	405,300
Weighted Average Grant Date Fair Value
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 19.71
Granted (in dollars per share) | $ / shares	15.36
Vested (in dollars per share) | $ / shares	19.74
Forfeited or cancelled (in dollars per share) | $ / shares	19.58
Outstanding at end of year (in dollars per share) | $ / shares	$ 16.94