Note 16 - Quarterly Data (Unaudited) - Quarterly Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended																12 Months Ended
		Dec. 01, 2018		Sep. 01, 2018		Jun. 02, 2018		Mar. 03, 2018		Dec. 02, 2017		Sep. 02, 2017		Jun. 03, 2017		Mar. 04, 2017		Dec. 01, 2018	Dec. 02, 2017	Dec. 03, 2016
Sales revenue		$ 768,429	[1]	$ 770,107	[1]	$ 789,387	[1]	$ 713,079	[1]	$ 678,200	[1]	$ 562,869	[1]	$ 561,651	[1]	$ 503,323	[1]	$ 3,041,002	$ 2,306,043	$ 2,094,605
Gross profit		209,600	[1]	217,204	[1]	222,385	[1]	187,705	[1]	168,788	[1]	150,125	[1]	146,527	[1]	139,630	[1]	836,894	605,070	605,822
Selling, general and administrative expenses 1		(139,844)	[1],[2]	(146,069)	[1],[2]	(145,199)	[1],[2]	(151,020)	[1],[2]	(151,126)	[1]	(110,219)	[1]	(102,770)	[1]	(112,915)	[1]	(582,132)	(477,030)	(407,638)
Net income including non-controlling interests		$ 41,365	[1]	$ 37,736	[1]	$ 44,464	[1]	$ 47,667	[1]	$ (6,893)	[1]	$ 24,969	[1]	$ 26,167	[1]	$ 15,223	[1]	$ 171,232	$ 59,466	$ 121,917
Basic Income per share (in dollars per share)	[1]	$ 0.82		$ 0.75		$ 0.88		$ 0.94		$ (0.14)		$ 0.50		$ 0.52		$ 0.30
Diluted Income per share (in dollars per share)	[1]	$ 0.79		$ 0.72		$ 0.86		$ 0.92		$ (0.13)		$ 0.48		$ 0.51		$ 0.30
Weighted-average common shares – basic (in shares)		50,712	[1]	50,632	[1]	50,551	[1]	50,471	[1]	50,356	[1],[2]	50,384	[1],[2]	50,496	[1],[2]	50,243	[1],[2]	50,591	50,370	50,136
Diluted (in shares)		52,017	[1]	52,138	[1]	51,846	[1]	51,898	[1]	51,724	[1],[2]	51,605	[1],[2]	51,686	[1],[2]	51,460	[1],[2]	51,975	51,619	51,270

[1] Amounts have been adjusted retrospectively for the change in accounting principle as discussed in Note 1.

[2] Quarterly income per share amounts may not equal full year amounts due to rounding.