XML 91 R72.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stockholders' Equity - Additional Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Sep. 30, 2006
Apr. 28, 2018
Apr. 29, 2017
Apr. 30, 2016
Apr. 28, 2012
Dec. 31, 2002
Mar. 31, 2013
Mar. 13, 2013
Dec. 31, 1991
Shareholders Equity [Line Items]                  
Common stock repurchased and retired (in shares)   2,147,000 2,855,000 4,379,000          
Common stock repurchased and retired, value   $ 87,500 $ 125,384 $ 200,000          
Average cost of common shares repurchased and retired (in usd per share)   $ 40.75 $ 43.91 $ 45.68          
Shares authorized for repurchase under share repurchase program (in shares)             25,000,000 500,000,000  
Remaining shares available under repurchase program (in shares)   500,000,000              
Hours of service completed in order to be allocated shares of stock acquired by plan   1000 hours              
Number of shares allocated to ESOP (in shares)   9,303,000              
Number of shares allocated to ESOP, Fair value   $ 216,567              
ESOP share based compensation expense   18,132 $ 1,315 $ 11,953          
Fair value of unearned shares by ESOP   $ 65,726 $ 68,071            
Minimum                  
Shareholders Equity [Line Items]                  
Unearned shares held by ESOP to occur over a period   5 years              
Maximum                  
Shareholders Equity [Line Items]                  
Unearned shares held by ESOP to occur over a period   10 years              
Unearned ESOP Shares                  
Shareholders Equity [Line Items]                  
Fair value of unearned shares by ESOP   $ 40,220              
Thompson Dental Company                  
Shareholders Equity [Line Items]                  
Additional loan to ESOP           $ 12,612      
ESOP acquiring shares during acquisition (in shares)           666,000      
Interest due from ESOP         $ 200        
Total shares allocated to ESOP (in shares)           98,000      
Remaining shares in ESOP (in shares)           568,000      
Committed-to-be-released (in shares)   13,000              
Suspense shares (in shares)   411,000              
1990 Note                  
Shareholders Equity [Line Items]                  
ESOP company loan                 $ 22,000
2006 Senior Notes                  
Shareholders Equity [Line Items]                  
ESOP company loan $ 105,000                
ESOP acquiring shares during acquisition (in shares) 3,160,000       844,000        
Contributed to ESOP         $ 20,214        
Committed-to-be-released (in shares)   483,000              
Suspense shares (in shares)   1,282,000