Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in the carrying amount of goodwill for the years ended December 31, 2016 and 2015 are as follows (dollars in thousands):



										Engineered
	Packaging			Aerospace			Energy			Components			Total
Balance, December 31, 2014	$	169,350		$	210,130		$	73,180		$	7,420		$	460,080
Goodwill from acquisitions	—			(3,500		)	—			2,320			(1,180		)
Impairment charge	—			—			(70,930		)	(3,180		)	(74,110		)
Foreign currency translation and other	(3,620		)	—			(2,250		)	—			(5,870		)
Balance, December 31, 2015	$	165,730		$	206,630		$	—		$	6,560		$	378,920
Impairment charge	—			(60,200		)	—			—			(60,200		)
Foreign currency translation and other	(3,640		)	—			—			—			(3,640		)
Balance, December 31, 2016	$	162,090		$	146,430		$	—		$	6,560		$	315,080

Schedule of Intangible Assets (excluding Goodwill) by Major Class

The Company amortizes its other intangible assets over periods ranging from one to 30 years. The gross carrying amounts and accumulated amortization of the Company's other intangibles as of December 31, 2016 and 2015 are summarized below (dollars in thousands):



	As of December 31, 2016					As of December 31, 2015
Intangible Category by Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
Finite-lived intangible assets:
Customer relationships, 5 - 12 years	$	73,570	$	(33,200	)	$	74,890	$	(25,960	)
Customer relationships, 15 - 25 years	132,230		(44,970		)	132,230		(38,060		)
Total customer relationships	205,800		(78,170		)	207,120		(64,020		)
Technology and other, 1 - 15 years	57,470		(26,040		)	57,860		(22,770		)
Technology and other, 17 - 30 years	43,300		(31,370		)	43,300		(29,250		)
Total technology and other	100,770		(57,410		)	101,160		(52,020		)
Indefinite-lived intangible assets:
Trademark/Trade names	42,930		—			81,630		—
Total other intangible assets	$	349,500	$	(135,580	)	$	389,910	$	(116,040	)

Schedule of Finite-Lived Intangible Assets, Amortization Expense

Amortization expense related to intangible assets as included in the accompanying consolidated statement of operations is summarized as follows (dollars in thousands):



	Year ended December 31,
	2016		2015		2014
Technology and other, included in cost of sales	$	5,680	$	6,010	$	5,030
Customer relationships, included in selling, general and administrative expenses	14,790		14,960		11,030
Total amortization expense	$	20,470	$	20,970	$	16,060

Schedule of Expected Amortization Expense [Table Text Block]

Estimated amortization expense for the next five fiscal years beginning after December 31, 2016 is as follows (dollars in thousands):



Year ended December 31,	Estimated Amortization Expense
2017		$19,800
2018		$19,470
2019		$19,100
2020		$18,160
2021		$15,380