Goodwill and Intangible Assets (Tables)

12 Months Ended

Oct. 28, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill

The gross carrying amount and accumulated amortization of our intangible assets other than goodwill as of October 28, 2016 and October 30, 2015 are as follows:

		October 28, 2016					October 30, 2015
In thousands	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Finite lived intangible assets:
Customer relationships	15 years	$	213,062	$	(81,952	)	$	215,703	$	(69,245	)
Engineering drawings	1 year	5,843		(4,964		)	5,843		(4,165		)
Patents	18 years	93,560		(32,948		)	93,520		(27,985		)
Trademarks	5 years	15,024		(8,078		)	15,039		(5,049		)
Unpatented technology	20 years	33,028		(9,164		)	32,852		(7,372		)
Subtotal	16 years	360,517		(137,106		)	362,957		(113,816		)
Indefinite-lived intangible assets:
Trademarks		—		—			6,569		—
Total other intangible assets		$	360,517	$	(137,106	)	$	369,526	$	(113,816	)

Gross Carrying Amount and Accumulated Amortization of Intangible Assets Other Than Goodwill

The gross carrying amount and accumulated amortization of our intangible assets other than goodwill as of October 28, 2016 and October 30, 2015 are as follows:

		October 28, 2016					October 30, 2015
In thousands	Weighted Average Amortization Period	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Finite lived intangible assets:
Customer relationships	15 years	$	213,062	$	(81,952	)	$	215,703	$	(69,245	)
Engineering drawings	1 year	5,843		(4,964		)	5,843		(4,165		)
Patents	18 years	93,560		(32,948		)	93,520		(27,985		)
Trademarks	5 years	15,024		(8,078		)	15,039		(5,049		)
Unpatented technology	20 years	33,028		(9,164		)	32,852		(7,372		)
Subtotal	16 years	360,517		(137,106		)	362,957		(113,816		)
Indefinite-lived intangible assets:
Trademarks		—		—			6,569		—
Total other intangible assets		$	360,517	$	(137,106	)	$	369,526	$	(113,816	)

Estimated Future Annual Amortization Expense

Estimated future annual amortization expense is as follows:

In thousands
For the fiscal year ending:
2017	$	22,750
2018	21,979
2019	21,860
2020	19,171
2021	18,729

Changes In Carrying Amount of Goodwill

Changes in the carrying amount of goodwill in fiscal 2016 and 2015 are as follows:

In thousands	Balance as of October 30, 2015			Disposition of business			Translation adjustments		Balance as of October 28, 2016
Underground
Goodwill	$	1,199,256		$	—		$	—	$	1,199,256
Accumulated impairment	(1,199,256		)	—			—		(1,199,256		)
Net goodwill	$	—		$	—		$	—	$	—
Surface
Goodwill	$	354,621		$	(4,345	)	$	567	$	350,843
Accumulated impairment	—			—			—		—
Net goodwill	$	354,621		$	(4,345	)	$	567	$	350,843
Total Consolidated
Goodwill	$	1,553,877		$	(4,345	)	$	567	$	1,550,099
Accumulated impairment	(1,199,256		)	—			—		(1,199,256		)
Net goodwill	$	354,621		$	(4,345	)	$	567	$	350,843

In thousands	Balance as of October 31, 2014		Goodwill acquired during the year		Goodwill impairment charges			Translation adjustments			Balance as of October 30, 2015
Underground
Goodwill	$	1,160,191	$	55,717	$	—		$	(16,652	)	$	1,199,256
Impairment charges	—		—		(1,199,256		)	—			(1,199,256		)
Net goodwill	$	1,160,191	$	55,717	$	(1,199,256	)	$	(16,652	)	$	—
Surface
Goodwill	$	356,502	$	—	$	—		$	(1,881	)	$	354,621
Impairment charges	—		—		—			—			—
Net goodwill	$	356,502	$	—	$	—		$	(1,881	)	$	354,621
Total Consolidated
Goodwill	$	1,516,693	$	55,717	$	—		$	(18,533	)	$	1,553,877
Impairment charges	—		—		(1,199,256		)	—			(1,199,256		)
Net goodwill	$	1,516,693	$	55,717	$	(1,199,256	)	$	(18,533	)	$	354,621