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Intangible Assets and Goodwill
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible Assets and Goodwill
Intangible Assets and Goodwill

Intangible Assets

Intangible assets consists of the following:
December 31, 2017
Gross Carrying Value
 
Accumulated Amortization
 
Net Carrying Value
Customer relationships
$
39,500

 
$
(17,577
)
 
$
21,923

Technology
400

 
(400
)
 

Brand name
300

 
(300
)
 

Total intangible assets
$
40,200

 
$
(18,277
)
 
$
21,923


December 31, 2016
Gross Carrying Value
 
Accumulated Amortization
 
Net Carrying Value
Customer relationships
$
39,500

 
$
(13,329
)
 
$
26,171

Technology
400

 
(360
)
 
40

Brand name
300

 
(300
)
 

Total intangible assets
$
40,200

 
$
(13,989
)
 
$
26,211


The customer relationship intangible assets are amortized on an accelerated basis over a 14 year period. The technology and brand name intangible assets were amortized on a straight line basis over three years and one year, respectively. At December 31, 2017, the weighted-average amortization period for remaining intangibles was 14 years. Amortization expense associated with intangible assets for the years ended December 31, 2017, 2016 and 2015 was $4.3 million, $4.8 million and $5.3 million, respectively.

The expected future amortization expense for intangible assets as of December 31, 2017, is as follows:
Year Ending December 31,
 
2018
$
3,872

2019
3,498

2020
3,122

2021
2,746

2022
2,370

Thereafter
6,315

Total
$
21,923



Goodwill

Goodwill consists of the following:
Balance at December 31, 2015
$
72,683

Goodwill impairment
(37,050
)
Balance at December 31, 2016
35,633

Other changes in goodwill

Balance at December 31, 2017
$
35,633


The Company has one reporting unit for goodwill impairment testing purposes, the patient and education finance (PEF) reporting unit. The Company performed a quantitative annual test for impairment as of April 1, 2017, according to which the estimated fair value of the PEF reporting unit substantially exceeded its carrying value. The Company estimates the fair value of the PEF reporting unit using the discounted cash flow model, which relies on several assumptions. These assumptions include weighted-average cost of capital, as well as transaction fee revenue based on projected loan origination growth, projected revenue growth, projected operating expenses and contribution margin, capital expenditures and income taxes. The Company believes these assumptions to be representative of assumptions that a market participant would use in valuing the PEF reporting unit, but these assumptions are inherently uncertain. Upon completion of the annual impairment test in the second quarter of 2017, the Company did not record any goodwill impairment.

The Company recorded a goodwill impairment expense of $37.1 million for the year ended December 31, 2016 related to the PEF reporting unit. There were no goodwill impairment expenses recorded for the years ended December 31, 2017 or December 31, 2015.