Business Segments (Tables)

6 Months Ended

Jun. 30, 2018

Segment Reporting [Abstract]

Summary of Net Sales and Results of Operations and Total Assets by Reportable Segment

(Dollars in thousands)
	Net Sales				Income from Operations
Three months ended	June 30, 2018		June 25, 2017		June 30, 2018		June 25, 2017
North America	$	204,758	$	186,898	$	9,676	$	(1,098	)
Europe		184,186		53,730		21,594		(900	)
	$	388,944	$	240,628	$	31,270	$	(1,998	)
(Dollars in thousands)
	Depreciation and Amortization				Capital Expenditures
Three months ended	June 30, 2018		June 25, 2017		June 30, 2018		June 25, 2017
North America	$	8,603	$	9,073	$	8,565	$	11,037
Europe		15,384		4,217		6,781		2,122
	$	23,987	$	13,290	$	15,346	$	13,159
(Dollars in thousands)
	Net Sales				Income from Operations
Six months ended	June 30, 2018		June 25, 2017		June 30, 2018		June 25, 2017
North America	$	408,908	$	361,118	$	23,461	$	2,846
Europe		366,484		53,730		35,443		(900	)
	$	775,392	$	414,848	$	58,904	$	1,946
(Dollars in thousands)
	Depreciation and Amortization				Capital Expenditures
Six months ended	June 30, 2018		June 25, 2017		June 30, 2018		June 25, 2017
North America	$	17,401	$	17,443	$	18,593	$	27,860
Europe		30,939		4,217		19,427		2,122
	$	48,340	$	21,660	$	38,020	$	29,982
(Dollars in thousands)
	Property, Plant and Equipment, net				Goodwill and Intangibles
	June 30, 2018		December 31, 2017		June 30, 2018		December 31, 2017
North America	$	244,813	$	245,178	$	—	$	—
Europe		286,532		291,508		480,817		508,278
	$	531,345	$	536,686	$	480,817	$	508,278

(Dollars in thousands)
	Total Assets
	June 30, 2018		December 31, 2017
North America	$	539,003	$	519,192
Europe		990,871		1,032,060
	$	1,529,874	$	1,551,252

Net Sales by Geographic Location

Net sales by geographic location is as follows:

	Three Months Ended				Six Months Ended
	June 30, 2018		June 25, 2017		June 30, 2018		June 25, 2017
(Dollars in thousands)
Net sales:
U.S.	$	30,527	$	34,435	$	61,010	$	66,223
Mexico		174,231		152,463		347,898		294,895
Germany		70,968		19,913		142,193		19,913
Poland		113,218		33,817		224,291		33,817
Consolidated net sales	$	388,944	$	240,628	$	775,392	$	414,848