Note 2 - Net Income Per Common Share - Computation of Basic and Diluted Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Jan. 01, 2017	Dec. 31, 2017	Jan. 01, 2017
Net income	$ 70,699	$ 62,929	$ 57,477	$ 47,158
Weighted average shares outstanding (in shares)	64,601	65,172	64,778	65,112
Effect of dilutive securities (in shares)	2,181	2,582	2,259	2,666
Adjusted weighted-average shares and assumed conversions (in shares)	66,782	67,754	67,037	67,778
Basic (in dollars per share)	$ 1.09	$ 0.97	$ 0.89	$ 0.72
Diluted (in dollars per share)	$ 1.06	$ 0.93	$ 0.86	$ 0.70
Employee Stock Option [Member]
Effect of dilutive securities (in shares)	1,549	1,526	1,528	1,503
Restricted Stock [Member]
Effect of dilutive securities (in shares)	632	1,056	731	1,163