Quarterly Data (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 04, 2017	Nov. 26, 2016	Aug. 27, 2016	May 28, 2016	Feb. 27, 2016	Nov. 28, 2015	Aug. 29, 2015	May 30, 2015	Mar. 04, 2017	Feb. 27, 2016	Feb. 28, 2015
Quarterly Financial Information Disclosure [Abstract]
Net sales	$ 314,126	$ 274,072	$ 278,455	$ 247,880	$ 262,149	$ 238,324	$ 240,754	$ 239,962	$ 1,114,533	$ 981,189	$ 933,936
Gross profit	82,196	72,868	72,531	64,428	68,857	62,426	56,699	55,588	292,023	243,570	208,544
Net earnings	$ 23,119	$ 22,552	$ 22,397	$ 17,722	$ 19,935	$ 18,521	$ 14,760	$ 12,126	$ 85,790	$ 65,342	$ 50,516
Earnings per share - basic
Earnings per share - basic (USD per share)	$ 0.81	$ 0.78	$ 0.78	$ 0.62	$ 0.69	$ 0.64	$ 0.51	$ 0.42	$ 2.98	$ 2.25	$ 1.76
Earnings per share - diluted
Earnings per share - diluted (USD per share)	$ 0.80	$ 0.78	$ 0.77	$ 0.61	$ 0.69	$ 0.63	$ 0.50	$ 0.41	$ 2.97	$ 2.22	$ 1.72