Other Assets

Other assets as of August 31, 2018, and 2017, are as follows:



	2018		(As Restated) 2017
	(Dollars in thousands)
Goodwill	$	138,464	$	138,454
Customer lists, trademarks and other intangible assets	29,338		33,330
Notes receivable	211,986		51,586
Deferred purchase price receivable	—		345,655
Long-term derivative assets	23,084		40,897
Prepaid pension and other benefits	101,539		122,433
Capitalized major maintenance	130,780		105,006
Cash value life insurance	123,010		118,677
Other	76,128		124,343
	$	834,329	$	1,080,381

Changes in the net carrying amount of goodwill for the years ended August 31, 2018, and 2017, by segment, are as follows:



	Energy		Ag			Corporate and Other			Total
	(Dollars in thousands)
Balances, August 31, 2016 - As previously reported	$	552	$	148,916		$	10,946		$	160,414
Cumulative restatement adjustments	—		(16,130		)	—			(16,130		)
Balances, August 31, 2016 - As restated	552		132,786			10,946			144,284
Effect of foreign currency translation adjustments	—		352			—			352
Impairment	—		(5,542		)	—			(5,542		)
Other	—		(268		)	(372		)	(640		)
Balances, August 31, 2017 - As restated	$	552	$	127,328		$	10,574		$	138,454
Effect of foreign currency translation adjustments	—		10			—			10
Other	—		—			—			—
Balances, August 31, 2018	$	552	$	127,338		$	10,574		$	138,464

No goodwill has been allocated to our Nitrogen Production segment, which consists of a single investment accounted for under the equity method.

All long-lived assets, including property, plant and equipment, goodwill, investments in unconsolidated affiliates and other identifiable intangible assets, are evaluated for impairment in accordance with U.S. GAAP. Goodwill is evaluated for impairment annually as of July 31. All long-lived assets, including goodwill, are also evaluated for impairment whenever triggering events or other circumstances indicate that the carrying amount of an asset group or reporting unit may not be recoverable. No material impairments related to long-lived assets were recorded, and no goodwill impairments were identified as a result of CHS’s annual goodwill analyses performed as of July 31, 2018.

During the year ended August 31, 2017, certain assets and liabilities associated with a disposal group in our Ag segment were classified as held for sale, including $5.5 million of goodwill allocated to the disposal group on a relative fair value basis. As a result of impairment tests performed over the disposal group, impairment charges of $78.8 million, which includes the allocated goodwill, were recorded in the reserve and impairment charges (recoveries), net line item in the Consolidated Statements of Operations for the year ended August 31, 2017. The disposal group assets were sold during the year ended August 31, 2018, and the related recoveries were recorded in the reserve and impairment charges (recoveries), net line item in the Consolidated Statements of Operations.

Intangible assets subject to amortization primarily include customer lists, trademarks and non-compete agreements, and are amortized over their respective useful lives (ranging from 2 to 30 years). Information regarding intangible assets included in other assets on our Consolidated Balance Sheets is as follows:



	August 31, 2018							August 31, 2017
	Carrying Amount		Accumulated Amortization			Net		Carrying Amount		Accumulated Amortization			Net
	(Dollars in thousands)
Customer lists	$	40,815	$	(13,082	)	$	27,733	$	46,180	$	(14,695	)	$	31,485
Trademarks and other intangible assets	6,536		(4,931		)	1,605		23,623		(21,778		)	1,845
Total intangible assets	$	47,351	$	(18,013	)	$	29,338	$	69,803	$	(36,473	)	$	33,330

Intangible asset amortization expense for the years ended August 31, 2018, 2017, and 2016, was $3.4 million, $4.3 million and $6.1 million, respectively. The estimated annual amortization expense related to intangible assets subject to amortization for the next five years is as follows:



	(Dollars in thousands)
2019	$	3,355
2020	3,272
2021	3,201
2022	2,989
2023	2,910
Thereafter	13,515
Total	$	29,242

Activity related to capitalized major maintenance costs at our refineries for the years ended August 31, 2018, 2017, and 2016, is summarized below:



	Balance at Beginning of Year		Cost Deferred		Amortization			Balance at End of Year
	(Dollars in thousands)
2018	$	105,006	$	87,460	$	(61,686	)	$	130,780
2017	169,054		3,010		(67,058		)	105,006
2016	241,588		949		(73,483		)	169,054