XML 1053 R35.htm IDEA: XBRL DOCUMENT v2.4.0.6
Reconciliation of Average Number of Common Shares Outstanding to Average Number of Diluted Shares Outstanding (Detail)
 12 Months Ended
Dec. 29, 2012
Dec. 31, 2011
Dec. 25, 2010
Accounting Policies [Line Items]      
Average number of common shares outstanding 46,698,000 47,444,000 49,523,000
Incremental shares from assumed exercises of stock options 179,000 80,000 57,000
Average number of common shares and common share equivalents outstanding 46,877,000 47,524,000 49,580,000