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Goodwill and Other Intangible Assets (Tables)
 12 Months Ended
Dec. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in the carrying amount of goodwill
The changes in the carrying amount of goodwill by segment were as follows:
(In thousands)
 
Piping Systems
 
Industrial Metals
 
Climate
 
Total
 
 
 
 
 
 
 
 
 
Goodwill
 
$
156,387

 
$
8,854

 
$
4,416

 
$
169,657

Accumulated impairment charges
 
(40,552
)
 
(8,853
)
 
—

 
(49,405
)
 
 
 
 
 
 
 
 
 
Balance at December 26, 2015:
 
115,835

 
1

 
4,416

 
120,252

 
 
 
 
 
 
 
 
 
Additions (1)
 
4,601

 
—

 
—

 
4,601

Currency translation
 
(860
)
 
—

 
—

 
(860
)
 
 
 
 
 
 
 
 
 
Balance at December 31, 2016:
 
119,576

 
1

 
4,416

 
123,993

 
 
 
 
 
 
 
 
 
Additions (2)
 
3,852

 
—

 
—

 
3,852

Currency translation
 
2,448

 
—

 
—

 
2,448

 
 
 
 
 
 
 
 
 
Balance at December 30, 2017:
 
 

 
 

 
 

 
 

Goodwill
 
166,428

 
8,854

 
4,416

 
179,698

Accumulated impairment charges
 
(40,552
)
 
(8,853
)
 
—

 
(49,405
)
 
 
 
 
 
 
 
 
 
Goodwill, net
 
$
125,876

 
$
1

 
$
4,416

 
$
130,293

(1) Includes finalization of the purchase price allocation adjustment for Great Lakes of $4.1 million.
(2) Includes finalization of the purchase price allocation adjustment for Jungwoo-Mueller of $0.2 million.
Carrying amount of intangible assets
The carrying amount of intangible assets at December 30, 2017 was as follows:

 
(In thousands)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
 
 
 
 
 
 
Customer relationships
 
$
36,518

 
$
(4,644
)
 
$
31,874

Non-compete agreements
 
2,834

 
(1,497
)
 
1,337

Patents and technology
 
7,673

 
(1,868
)
 
5,805

Trade names and licenses
 
4,977

 
(1,575
)
 
3,402

Other
 
213

 
(623
)
 
(410
)
 
 
 
 
 
 
 
Other intangible assets
 
$
52,215

 
$
(10,207
)
 
$
42,008


The carrying amount of intangible assets at December 31, 2016 was as follows:

 
(In thousands)
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
 
 
 
 
 
 
Customer relationships
 
$
29,833

 
$
(2,845
)
 
$
26,988

Non-compete agreements
 
5,926

 
(4,063
)
 
1,863

Patents and technology
 
5,922

 
(1,179
)
 
4,743

Trade names and licenses
 
4,087

 
(1,032
)
 
3,055

Other
 
213

 
(694
)
 
(481
)
 
 
 
 
 
 
 
Other intangible assets
 
$
45,981

 
$
(9,813
)
 
$
36,168
Amortization expense for intangible assets
Future amortization expense is estimated as follows:

(In thousands)
 
Amount
 
 
 
2018
 
$
3,338

2019
 
3,253

2020
 
3,017

2021
 
2,747

2022
 
2,851

Thereafter
 
26,802

 
 
 

Expected amortization expense
 
$
42,008