Debt - Additional Information (Detail)	1 Months Ended	12 Months Ended					12 Months Ended		1 Months Ended	3 Months Ended	12 Months Ended					1 Months Ended		12 Months Ended		1 Months Ended				12 Months Ended			12 Months Ended	1 Months Ended		12 Months Ended		1 Months Ended		12 Months Ended
	Apr. 30, 2013 USD ($)	Oct. 31, 2014 USD ($)	Oct. 25, 2013 USD ($)	Oct. 26, 2012 USD ($)	Oct. 30, 2008 sqft	Oct. 31, 2014 Control System Facility USD ($)	Oct. 31, 2014 Manufacturing Facility for Control Systems Operation USD ($)	Oct. 31, 2014 Interface Technologies Facility USD ($)	Jul. 31, 2011 Euro Term Loan EUR (€)	Aug. 01, 2014 Euro Term Loan USD ($)	Oct. 31, 2014 Euro Term Loan USD ($)	Oct. 25, 2013 Euro Term Loan USD ($)	Oct. 31, 2014 US Term Loans USD ($)	Oct. 25, 2013 US Term Loans USD ($)	Apr. 30, 2013 US Term Loans USD ($)	Apr. 30, 2013 Senior Notes Six Point Six Two Five Percent Maturing In March Two Thousand Seventeen USD ($)	Aug. 31, 2010 Senior Notes 7% Maturing in August 2020 USD ($)	Oct. 31, 2014 Senior Notes 7% Maturing in August 2020	Oct. 25, 2013 Senior Notes 7% Maturing in August 2020	Aug. 31, 2010 Senior Notes 7% Maturing in August 2020 Debt Redemption After August 1, 2015	Aug. 31, 2010 Senior Notes 7% Maturing in August 2020 Debt Redemption After August First Two Thousand Eighteen	Aug. 31, 2010 Senior Notes 7% Maturing in August 2020 Debt Redemption Prior August First Two Thousand Fifteen	Mar. 31, 2011 Secured Debt USD ($)	Oct. 31, 2014 Secured Debt USD ($)	Oct. 31, 2014 Senior Notes Due Twenty Twenty USD ($)	Oct. 25, 2013 Senior Notes Due Twenty Twenty USD ($)	Oct. 31, 2014 Minimum US Term Loans	Apr. 30, 2013 Minimum London Interbank Offered Rate (LIBOR) US Term Loans	Mar. 31, 2011 Minimum London Interbank Offered Rate (LIBOR) Secured Debt	Oct. 31, 2014 Minimum London Interbank Offered Rate (LIBOR) Secured Debt	Oct. 31, 2014 Maximum US Term Loans	Apr. 30, 2013 Maximum London Interbank Offered Rate (LIBOR) US Term Loans	Mar. 31, 2011 Maximum London Interbank Offered Rate (LIBOR) Secured Debt	Oct. 31, 2014 Maximum London Interbank Offered Rate (LIBOR) Secured Debt
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity		$ 387,900,000																					$ 460,000,000	$ 59,800,000
Credit facility expiration date																							Jul. 31, 2016
Interest rate, basis spread on variable rate																											1.50%	1.50%	1.50%	1.50%	1.66%	2.25%	2.25%	1.66%
Credit facility interest rate description																							The interest rate ranges from LIBOR plus 1.50% to LIBOR plus 2.25%, depending on the leverage ratios at the time the funds are drawn.	Interest rate of LIBOR plus 1.50%, which is currently 1.66%.
Available credit under credit facilities		519,800,000
Credit facility													161,900,000											100,000,000
Outstanding letters of credit																								31,900,000
Term Loan									125,000,000		0	24,847,000	161,875,000	170,625,000	175,000,000
Early payment of debt									125,000,000
Net loss on extinguishment of debt		(533,000)	(946,000)	0						(500,000)						(900,000)
Loan amortization rate													1.25%
Loan amortization end date													Mar. 31, 2016
Loan remaining balance due date											Jul. 31, 2016	Jul. 31, 2016	Jul. 31, 2016	Jul. 31, 2016				Aug. 31, 2020	Aug. 31, 2020
Amount of interest rate swap agreement	175,000,000
Unamortized debt issuance cost		4,295,000	6,211,000													1,300,000
Redemption premium in connection with early redemption of notes	3,900,000
Gain on termination of interest rate swap	2,900,000
Debt instrument, carrying amount																	250,000,000								250,000,000
Fixed interest rate																	7.00%	7.00%	7.00%
Debt issuance cost																	4,400,000
Net proceeds from issuance of debt																	245,600,000
Debt instrument redemption price percentage plus accrued interest																				103.50%	100.00%	100.00%
Fair market value of long-term debt and short-term borrowings		639,400,000	711,600,000																						266,900,000	272,500,000
Imputed interest on advance		460.00%
Discounted value of debt		51,900,000	56,900,000
Capital lease size of facility under lease agreement in square feet					216,000
Capital lease fixed lease term, in years					30 years
Capital lease minimum annual rent increase					2.00%
Capitalized lease obligation		$ 58,448,000	$ 56,229,000			$ 11,600,000	$ 32,400,000	$ 11,500,000
Capital lease imputed interest rate		4.50%					9.00%	6.40%