Goodwill and Intangible Assets
 3 Months Ended
Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
Goodwill and Intangible Assets
The changes in carrying amounts of goodwill during the three months ended March 31, 2015 were as follows:

 
Metals
Segment
 
Plastics
Segment
 
Total
Balance as of January 1, 2015
 
 
 
 
 
Goodwill
$
116,377

 
$
12,973

 
$
129,350

Accumulated impairment losses
(116,377
)
 
—

 
(116,377
)
Balance as of January 1, 2015
—

 
12,973

 
12,973

Balance as of March 31, 2015
 
 
 
 
 
Goodwill
116,377

 
12,973

 
129,350

Accumulated impairment losses
(116,377
)
 
—

 
(116,377
)
Balance as of March 31, 2015
$
—

 
$
12,973

 
$
12,973


The Company tests goodwill for impairment at the reporting unit level on an annual basis as of December 1 and more often if an event occurs or circumstances change that would more likely than not reduce the fair value of a reporting unit below its carrying value. The Company assesses, at least quarterly, whether any triggering events have occurred. A two-step method is used for determining goodwill impairment. The first step is performed to identify whether a potential impairment exists by comparing each reporting unit’s fair value to its carrying value. If the carrying value of a reporting unit exceeds its fair value, the next step is to measure the amount of impairment loss, if any.
The Company completed its December 1, 2014 annual goodwill impairment test for its Plastics reporting unit and there were no identified impairment charges. No annual goodwill impairment testing was performed for the Metals reporting unit as of December 1, 2014, since the Metals reporting unit goodwill was eliminated as a result of second quarter 2014 interim goodwill impairment testing.
The following table summarizes the components of intangible assets, all of which relate to the Metals reporting unit:
 
March 31, 2015
 
December 31, 2014
 
Gross
Carrying
Amount
 
Accumulated
Amortization
 
Gross
Carrying
Amount
 
Accumulated
Amortization
Customer relationships
$
114,785

 
$
67,008

 
$
116,268

 
$
64,922

Non-compete agreements
3,888

 
3,888

 
3,888

 
3,888

Trade name
7,708

 
2,790

 
7,864

 
2,655

Developed technology
1,400

 
1,400

 
1,400

 
1,400

Total
$
127,781

 
$
75,086

 
$
129,420

 
$
72,865



For the three months ended March 31, 2015 and 2014, the aggregate amortization expense was $2,672 and $2,916, respectively.
The following is a summary of the estimated annual amortization expense for 2015 and each of the next 4 years:
2015
$
10,650

2016
10,650

2017
8,626

2018
4,514

2019
4,514