CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Sep. 27, 2014	Dec. 28, 2013
Current assets:
Allowance for doubtful accounts (in dollars)	$ 3,379	$ 3,015
Shareowners' equity:
Common shares, authorized (in shares)	65,000	65,000
Common shares, par value (in dollars per share)	$ 0.10	$ 0.10
Common shares, outstanding	47,562	47,715