Summary of Significant Accounting Policies (Earnings Per Share) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 03, 2015	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 28, 2013	Sep. 28, 2013	Jun. 29, 2013	Mar. 30, 2013	Jan. 03, 2015	Dec. 28, 2013	Dec. 29, 2012	Dec. 31, 2011	Jan. 03, 2009
Numerators:
Numerators for both basic and diluted EPS net income attributable to parent company	$ 7,082	$ 33,588	$ 9,705	$ 11,096	$ 22,760	$ 28,094	$ 11,421	$ 1,408	$ 61,471	$ 63,683	$ 48,967
Denominators:
Denominator for basic EPS weighted- average common shares outstanding	44,324,000	44,690,000	45,020,000	45,039,000	45,117,000	45,318,000	45,413,000	45,155,000	44,759,716	45,250,665	45,211,385
Potentially dilutive shares from stock-based compensation plans									819,000	706,000	609,000
Denominator for diluted EPS	45,202,000	45,611,000	45,868,000	45,838,000	45,964,000	46,090,000	46,110,000	45,720,000	45,578,872	45,956,280	45,819,979
Earnings per share - basic	$ 0.16	$ 0.75	$ 0.22	$ 0.25	$ 0.50	$ 0.62	$ 0.25	$ 0.03	$ 1.37	$ 1.41	$ 1.08
Earnings per share - diluted	$ 0.16	$ 0.74	$ 0.21	$ 0.24	$ 0.50	$ 0.61	$ 0.25	$ 0.03	$ 1.35	$ 1.39	$ 1.07	$ 1.01	$ 0.59