Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

Changes in the carrying amount of goodwill for the years ended December 31, 2015 and 2014 are as follows:

										Engineered
	Packaging			Aerospace			Energy			Components			Total
	(dollars in thousands)
Balance, December 31, 2013	$	158,060		$	61,080		$	75,920		$	7,420		$	302,480
Goodwill from acquisitions	15,810			149,050			—			—			164,860
Foreign currency translation and other	(4,520		)	—			(2,740		)	—			(7,260		)
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

Schedule of Intangible Assets (excluding Goodwill) by Major Class

The gross carrying amounts and accumulated amortization of the Company's other intangibles as of December 31, 2015 and 2014 are summarized below. The Company amortizes these assets over periods ranging from one to 30 years.

	As of December 31, 2015					As of December 31, 2014
Intangible Category by Useful Life	Gross Carrying Amount		Accumulated Amortization			Gross Carrying Amount		Accumulated Amortization
	(dollars in thousands)
Finite-lived intangible assets:
Customer relationships, 5 - 12 years	$	74,890	$	(25,960	)	$	75,300	$	(18,180	)
Customer relationships, 15 - 25 years	132,230		(38,060		)	132,230		(31,140		)
Total customer relationships	207,120		(64,020		)	207,530		(49,320		)
Technology and other, 1 - 15 years	57,860		(22,770		)	58,040		(18,750		)
Technology and other, 17 - 30 years	43,300		(29,250		)	43,300		(27,150		)
Total technology and other	101,160		(52,020		)	101,340		(45,900		)
Indefinite-lived intangible assets:
Trademark/Trade names	81,630		—			83,770		—
Total other intangible assets	$	389,910	$	(116,040	)	$	392,640	$	(95,220	)

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:

	Year ended December 31,
	2015		2014		2013
	(dollars in thousands)
Technology and other, included in cost of sales	$	6,010	$	5,030	$	4,460
Customer relationships, included in selling, general and administrative expenses	14,960		11,030		7,830
Total amortization expense	$	20,970	$	16,060	$	12,290

Schedule of Expected Amortization Expense [Table Text Block]

Estimated amortization expense for the next five fiscal years beginning after December 31, 2015 is as follows:

Year ended December 31,	Estimated Amortization Expense
	(dollars in thousands)
2016		$20,340
2017		$20,090
2018		$19,660
2019		$19,240
2020		$18,310