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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2016
Segment Reporting Information, Revenue for Reportable Segment [Abstract]  
Measurements Used by Management to Assess Performance of Segments
The following table illustrates certain measurements used by management to assess the performance of the segments described above as of and for the years ended December 31 (in thousands):
 
2016
 
2015
 
2014
Net sales:
 
 
 
 
 
Residential Products
$
430,938

 
$
475,653

 
$
431,915

Industrial and Infrastructure Products
296,513

 
378,224

 
431,432

Less: Intersegment sales
(1,495
)
 
(1,536
)
 
(1,260
)
 
295,018

 
376,688

 
430,172

Renewable Energy and Conservation
282,025

 
188,532

 
—

Total consolidated net sales
$
1,007,981

 
$
1,040,873

 
$
862,087

 
 
 
 
 
 
Income (loss) from operations:
 
 
 
 
 
Residential Products
$
65,241

 
$
46,804

 
$
16,416

Industrial and Infrastructure Products
1,306

 
15,581

 
(74,634
)
Renewable Energy and Conservation
43,214

 
12,659

 
—

Unallocated Corporate Expenses
(36,797
)
 
(26,959
)
 
(12,199
)
 
$
72,964

 
$
48,085

 
$
(70,417
)
Depreciation and Amortization
 
 
 
 
 
Residential Products
$
9,297

 
$
9,967

 
$
10,699

Industrial and Infrastructure Products
8,237

 
12,108

 
13,910

Renewable Energy and Conservation
6,203

 
7,811

 
—

Unallocated Corporate Expenses
377

 
662

 
823

 
$
24,114

 
$
30,548

 
$
25,432

Total assets
 
 
 
 
 
Residential Products
$
331,975

 
$
363,339

 
$
394,092

Industrial and Infrastructure Products
225,691

 
273,987

 
308,150

Renewable Energy and Conservation
207,241

 
215,211

 
—

Unallocated Corporate
153,338

 
37,235

 
108,229

 
$
918,245

 
$
889,772

 
$
810,471

Capital expenditures
 
 
 
 
 
Residential Products
$
5,182

 
$
3,328

 
$
12,731

Industrial and Infrastructure Products
2,060

 
4,846

 
10,425

Renewable Energy and Conservation
3,160

 
3,871

 
—

Unallocated Corporate Expenses
377

 
328

 
135

 
$
10,779

 
$
12,373

 
$
23,291
Net Sales by Region or Origin and Long-Lived Assets by Region of Domicile
Net sales by region or origin and long-lived assets by region of domicile for the years ended and as of December 31 are as follows (in thousands):
 
2016
 
2015
 
2014
Net sales
 
 
 
 
 
North America
$
963,797

 
$
968,414

 
$
816,473

Europe
19,447

 
48,216

 
45,614

Asia
24,737

 
24,243

 
—

Total
$
1,007,981

 
$
1,040,873

 
$
862,087

 
 
 
 
 
 
Long-lived assets
 
 
 
 
 
North America
$
108,334

 
$
110,571

 
$
122,824

Europe
2,900

 
11,084

 
8,957

Asia
992

 
1,292

 
—

Total
$
112,226

 
$
122,947

 
$
131,781