Summary of Significant Accounting Policies (Earnings Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016	Jan. 02, 2016	Jan. 03, 2015
Numerators:
Numerators for both basic and diluted EPS net income attributable to parent company	$ 85,577	$ 105,436	$ 61,471
Denominators:
Denominator for basic EPS weighted- average common shares outstanding	44,413,941	44,285,298	44,759,716
Potentially dilutive shares from stock-based compensation plans (shares)	1,088,000	1,156,000	819,000
Denominator for diluted EPS (shares)	45,502,219	45,440,653	45,578,872
Earnings per share - basic (in dollars per share)	$ 1.93	$ 2.38	$ 1.37
Earnings per share - diluted (in dollars per share)	$ 1.88	$ 2.32	$ 1.35