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GOODWILL AND INTANGIBLES - (Tables)
 9 Months Ended
Sep. 28, 2019
Business Acquisition [Line Items]  
Goodwill by Reportable Segment and in Total
Changes in the carrying amount of goodwill, by reportable segment, from December 29, 2018 to September 28, 2019 are summarized as follows: 
 
West
 
East
 
Cement
 
Total  
Balance, December 29, 2018
$
580,567

 
$
406,805

 
$
204,656

 
$
1,192,028

Acquisitions (1)
1,167

 
3,621

 
—

 
4,788

Foreign currency translation adjustments
1,680

 
—

 
—

 
1,680

Balance, September 28, 2019
$
583,414

 
$
410,426

 
$
204,656

 
$
1,198,496

_____________________________________________________________________________________________
(1)
Reflects goodwill from 2019 acquisitions and working capital adjustments from prior year acquisitions.
Intangible Assets by Type and in Total The following table shows intangible assets by type and in total:
 
September 28, 2019
 
December 29, 2018
 
Gross
 Carrying
 Amount
 
Accumulated
 Amortization
 
Net
 Carrying
 Amount
 
Gross
 Carrying
 Amount
 
Accumulated
 Amortization
 
Net
 Carrying
 Amount
Mineral leases
$
19,064

 
$
(6,124
)
 
$
12,940

 
$
19,064

 
$
(5,259
)
 
$
13,805

Reserve rights
6,234

 
(2,174
)
 
4,060

 
6,234

 
(1,940
)
 
4,294

Trade names
1,000

 
(933
)
 
67

 
1,000

 
(858
)
 
142

Other
7,814

 
(435
)
 
7,379

 
409

 
(190
)
 
219

Total intangible assets
$
34,112

 
$
(9,666
)
 
$
24,446

 
$
26,707

 
$
(8,247
)
 
$
18,460
Estimated Amortization Expense for Intangible Assets The estimated amortization expense for the intangible assets for each of the five years subsequent to September 28, 2019 is as follows:
2019 (three months)
$
711

2020
2,552

2021
2,164

2022
2,168

2023
2,035

2024
1,940

Thereafter
12,876

Total
$
24,446
Summit Materials, LLC  
Business Acquisition [Line Items]  
Goodwill by Reportable Segment and in Total
Changes in the carrying amount of goodwill, by reportable segment, from December 29, 2018 to September 28, 2019 are summarized as follows:

 
 
West
 
East
 
Cement
 
Total  
Balance, December 29, 2018
 
$
581,567

 
$
406,805

 
$
204,656

 
$
1,193,028

Acquisitions (1)
 
1,167

 
3,621

 
—

 
4,788

Foreign currency translation adjustments
 
1,680

 
—

 
—

 
1,680

Balance, September 28, 2019
 
$
584,414

 
$
410,426

 
$
204,656

 
$
1,199,496

_______________________________________________________________________
(1) Reflects goodwill from 2019 acquisitions and working capital adjustments from prior year acquisitions.
Intangible Assets by Type and in Total The following table shows intangible assets by type and in total:
 
 
 
September 28, 2019
 
December 29, 2018
 
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Net
Carrying
Amount
Mineral leases
 
$
19,064

 
$
(6,124
)
 
$
12,940

 
$
19,064

 
$
(5,259
)
 
$
13,805

Reserve rights
 
6,234

 
(2,174
)
 
4,060

 
6,234

 
(1,940
)
 
4,294

Trade names
 
1,000

 
(933
)
 
67

 
1,000

 
(858
)
 
142

Other
 
7,814

 
(435
)
 
7,379

 
409

 
(190
)
 
219

Total intangible assets
 
$
34,112

 
$
(9,666
)
 
$
24,446

 
$
26,707

 
$
(8,247
)
 
$
18,460
Estimated Amortization Expense for Intangible Assets The estimated amortization expense for the intangible assets for each of the five years subsequent to September 28, 2019 is as follows:
 
2019 (three months)
$
711

2020
2,552

2021
2,164

2022
2,168

2023
2,035

2024
1,940

Thereafter
12,876

Total
$
24,446