Capital Transactions - Additional Information (Detail) (USD $)
In Millions, except Share data, unless otherwise specified |
0 Months Ended | 3 Months Ended | 0 Months Ended | 3 Months Ended | |||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Apr. 29, 2008
|
Mar. 30, 2014
Vote
Stock
|
Mar. 31, 2013
|
Mar. 28, 2014
|
Mar. 29, 2013
|
Mar. 04, 2014
Class B Common Stock [Member]
|
Mar. 05, 2013
Class B Common Stock [Member]
|
Mar. 30, 2014
Class B Common Stock [Member]
Vote
|
Mar. 31, 2013
Class B Common Stock [Member]
|
Apr. 29, 2008
Class B Common Stock [Member]
|
Apr. 29, 2008
Performance Shares [Member]
|
|
Schedule of Capitalization, Equity [Line Items] | |||||||||||
Number of classes of common stock outstanding | 2 | ||||||||||
Dividend is declared and paid on the Common Stock | $ 0.25 | $ 0.25 | $ 0.25 | $ 0.25 | |||||||
Number of votes per share | 1 | 20 | |||||||||
Performance units authorized | 400,000 | ||||||||||
Term of performance unit award agreement | 10 years | ||||||||||
Common B stock per performance unit | 1 | ||||||||||
Annual performance units granted | 40,000 | ||||||||||
Maximum overall goal achievement factor | 100.00% | ||||||||||
Performance Unit Award Agreement expense recognized | $ 0.9 | $ 0.6 | |||||||||
Share price | $ 85.25 | $ 60.32 | |||||||||
Performance units awarded | 40,000 | 40,000 | |||||||||
Performance units awards settled in cash | 19,100 | 19,880 | |||||||||
Increase in total number of shares outstanding | 20,900 | 20,120 |