Significant Accounting Policies - Advertising Expense (Detail) - USD ($) $ in Thousands	12 Months Ended
Feb. 25, 2017	Feb. 27, 2016	Feb. 28, 2015
Accounting Policies [Abstract]
Advertising expense	$ 47,137	$ 42,668	$ 38,035
Cooperative advertising credits	(7,882)	(6,342)	(4,540)
Net advertising expense	$ 39,255	$ 36,326	$ 33,495

Total amount received by an entity from a vendor under a cooperative advertising arrangement that has been offset against advertising expense.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 605
-SubTopic 50
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=68069731&loc=d3e63872-111659

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Cooperative Advertising
-URI http://asc.fasb.org/extlink&oid=51574790

Name:	us-gaap_CooperativeAdvertisingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration