Stockholders' Equity Rollforward (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 02, 2017	Jul. 03, 2016	Jul. 02, 2017	Jul. 03, 2016	Jan. 02, 2017
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period			$ 527,736	$ 752,914
Comprehensive income	$ 4,663	$ 28,447	29,490	66,931
Cash dividends			(34,447)	(32,152)
Repurchases of common stock			(52,501)	(109,348)
Share-based compensation			11,372	9,925
Exercises of stock options			6,161	6,238
Vesting of restricted shares			(2,732)	(2,841)
Cumulative Effect of New Accounting Principle in Period of Adoption		0		0	$ 1,880
Tax benefit from share-based compensation			0	1,402
Other			90	95
Balance at end of period	$ 487,049	$ 693,164	$ 487,049	$ 693,164