Business Segments (Tables)

3 Months Ended

Mar. 31, 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	March 31, 2018		March 26, 2017		March 31, 2018		March 26, 2017
North America	$	204,150	$	174,220	$	13,785	$	3,944
Europe		182,298		—		13,849		—
	$	386,448	$	174,220	$	27,634	$	3,944
(Dollars in thousands)
	Depreciation and Amortization				Capital Expenditures
Three months ended	March 31, 2018		March 26, 2017		March 31, 2018		March 26, 2017
North America	$	8,797	$	8,370	$	10,028	$	16,823
Europe		15,556		—		12,646		—
	$	24,353	$	8,370	$	22,674	$	16,823
(Dollars in thousands)
	Property, Plant and Equipment, net				Long-lived Intangible Assets
	March 31, 2018		December 31, 2017		March 31, 2018		December 31, 2017
North America	$	251,874	$	245,178	$	—	$	—
Europe		300,278		291,508		201,559		203,473
	$	552,152	$	536,686	$	201,559	$	203,473

(Dollars in thousands)
	Total Assets
	March 31, 2018		December 31, 2017
North America	$	569,798	$	519,192
Europe		1,048,003		1,032,060
	$	1,617,801	$	1,551,252

Net Sales by Geographic Location

Net sales by geographic location is the following:

Three months ended	March 31, 2018		March 26, 2017
(Dollars in thousands)
Net sales:
U.S.	$	30,484	$	33,731
Mexico		173,666		140,489
Germany		71,225		—
Poland		111,073		—
Consolidated net sales	$	386,448	$	174,220