Earnings Per Share and Shareholders Equity - Additional Information (Detail) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended	45 Months Ended
	May 04, 2018	Mar. 30, 2018	Mar. 31, 2017	Mar. 30, 2018	Mar. 31, 2017	Sep. 29, 2017	Mar. 30, 2018	Mar. 31, 2015	Jun. 30, 2014
Earnings Per Share And Shareholders Equity [Line Items]
Anti-dilutive shares excluded from computation of earnings per share		970,625	740,575		775,225
Preferred stock shares authorized		25,000		25,000			25,000
Preferred stock, par value		$ 100		$ 100			$ 100
Common stock, shares authorized		60,000,000		60,000,000		60,000,000	60,000,000
Common stock, par value		$ 0.20		$ 0.20		$ 0.20	$ 0.20
Preferred stock shares outstanding		0		0		0	0
Approved and authorized amount under the stock repurchase program								$ 400,000,000	$ 200,000,000
Additional approved and authorized amount under the stock repurchase program								$ 200,000,000
Stock repurchased during period, shares		313,900	0	601,400	0	0	3,737,327
Average price paid per share of repurchased stock		$ 73.29		$ 72.25
Aggregate value of repurchased stock		$ 23,000,000		$ 43,400,000			$ 352,000,000
Stock repurchase program, remaining authorized amount available for repurchase in future			$ 48,000,000		$ 48,000,000
Subsequent Event
Earnings Per Share And Shareholders Equity [Line Items]
Stock repurchased during period, shares	0
Series B Preferred Stock
Earnings Per Share And Shareholders Equity [Line Items]
Preferred stock shares authorized		475,000		475,000			475,000
Preferred stock, par value		$ 1.00		$ 1.00			$ 1.00
Preferred stock shares outstanding		0		0		0	0