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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
Goodwill and Other Intangible Assets
(in thousands)
Banking

Insurance

Wealth Management

Total
Balance at January 1, 2016
$
64,369


$
19,212


$
8,211


$
91,792

Goodwill related to sale of portion of business unit1
0


(318
)

0


(318
)
Balance at December 31, 2016
$
64,369


$
20,043


$
8,211


$
92,623

Goodwill related to sale of portion of business unit1
0


(332
)

0


(332
)
Balance at December 31, 2017
$
64,369


$
19,711


$
8,211


$
92,291

 
1 The $332,000 and $318,000 reduction of goodwill in 2017 and 2016, respectively, reflects an adjustment related to the sale of a portion of insurance revenues. In 2016 and 2017, Tompkins Insurance sold a portion of its personal lines insurance revenues, which had been acquired in a previous acquisition, to a third party.
 
Goodwill is assigned to reporting units. The Company reviews its goodwill and intangible assets annually, or more frequently 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. Based on the Company’s 2017 review, there was no impairment of its goodwill or intangible assets. The Company’s impairment testing is highly sensitive to certain assumptions and estimates used. In the event that economic or credit conditions deteriorate significantly, additional interim impairment tests may be required.
 
Other Intangible Assets

The following table provides information regarding the Company's amortizing intangible assets:

December 31, 2017
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
(in thousands)
 
 
 
 
 
Amortized intangible assets:
 
 
 
 
 
Core deposit intangible
$
18,774

 
$
14,302

 
$
4,472

Customer relationships
8,878

 
5,339

 
3,539

Other intangibles
5,776

 
4,524

 
1,252

Total intangible assets
$
33,428

 
$
24,165

 
$
9,263


December 31, 2016
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
(in thousands)
 
 
 
 
 
Amortized intangible assets:
 
 
 
 
 
Core deposit intangible
$
18,774

 
$
13,129

 
$
5,645

Customer relationships
8,942

 
4,737

 
4,205

Other intangibles
5,744

 
4,245

 
1,499

Total intangible assets
$
33,460

 
$
22,111

 
$
11,349


 
Amortization expense related to intangible assets totaled $1.9 million in 2017, $2.1 million in 2016 and $2.0 million in 2015. The estimated aggregate future amortization expense for intangible assets remaining as of December 31, 2017 is as follows:
 
Estimated amortization expense:*
 
(in thousands)
 
For the year ended December 31, 2018
$
1,796

For the year ended December 31, 2019
1,671

For the year ended December 31, 2020
1,472

For the year ended December 31, 2021
1,307

For the year ended December 31, 2022
864

 
*Excludes the amortization of mortgage servicing rights.  Amortization of mortgage servicing rights was $122,000 in 2017, $157,000 in 2016 and $146,000 in 2015.