Long-Lived Assets (Tables)

12 Months Ended

Sep. 30, 2013

Long-Lived Assets

Schedule of property, plant and equipment

Property, Plant and Equipment—Property, plant and equipment consisted of the following at September 30:

(in thousands of dollars)	Estimated useful lives	2012			2013
Land and improvements	15 - 40 years	$	11,761		$	11,359
Buildings and improvements	5 - 40 years		59,433			61,760
Equipment and vehicles	3 - 20 years		190,649			204,438
Dies and molds	3 - 20 years		75,265			79,248
Construction in progress	—		9,605			11,608
			346,713			368,413
Less accumulated depreciation			(187,007	)		(208,794	)
Net property, plant and equipment		$	159,706		$	159,619

Schedule of gross carrying amounts and accumulated amortization of intangible assets

The following table summarizes the gross carrying amounts and related accumulated amortization of all intangible assets as of September 30:

		2012				2013
(in thousands of dollars)	Estimated useful lives	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Trade name	Indefinite	$	0		—	$	4,800		—
CCP contracts	20 years		106,400	$	53,379		106,400	$	58,699
Customer relationships	5 - 15 years		72,464		38,382		83,564		44,129
Trade names	5 - 20 years		67,890		27,105		67,790		30,502
Patents and patented technologies	4 - 19 years		55,102		41,661		55,099		46,954
Other	3 - 17 years		3,760		1,178		3,960		1,532
		$	305,616	$	161,705	$	321,613	$	181,816

Schedule of total currently estimated annual amortization expense

Year ending September 30:	(in thousands)
2014	$	19,946
2015		15,820
2016		15,563
2017		14,685
2018		14,637

Schedule of goodwill

Goodwill—Changes in the carrying amount of goodwill, by segment, are as follows for the two-year period ended September 30, 2013.

(in thousands)	Light building products		Heavy construction materials		Total
Balances as of September 30, 2011 and 2012	$	672	$	115,999	$	116,671
Goodwill related to 2013 acquisition		20,527		0		20,527
Balances as of September 30, 2013	$	21,199	$	115,999	$	137,198