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

The activity impacting goodwill in 2017 and 2016 is as follows:
(in thousands)
 
2017
 
2016
Balance at beginning of year
 
$
4,935

 
$
4,935

Lake Sunapee Bank Group acquisition
 
95,150

 

Balance at end of year
 
$
100,085

 
$
4,935



In 2017, the Company completed its annual goodwill impairment testing using data as of September 30, 2017. The analysis was performed at the consolidated Bank level of the Company, which is considered the smallest reporting unit carrying goodwill. The step one analysis under the guidance of ASC 350 was passed, and therefore step two of the goodwill impairment test was not performed and no goodwill impairment was recognized for the year ended December 31, 2017. No impairment was recorded in 2016 and 2015.

The components of other intangible assets in 2017 and 2016 are as follows:
 
 
2017
(in thousands)
 
Gross Intangible Assets
 
Accumulated Amortization
 
Net Intangible Assets
Core deposit intangible (non-maturity deposits)
 
$
8,585

 
$
(1,136
)
 
$
7,449

Customer list and other intangibles
 
1,016

 
(82
)
 
934

Total
 
$
9,601

 
$
(1,218
)
 
$
8,383


 
 
2016
(in thousands)
 
Gross Intangible Assets
 
Accumulated Amortization
 
Net Intangible Assets
Core deposit intangible (non-maturity deposits)
 
$
783

 
$
(406
)
 
$
377

Total
 
$
783

 
$
(406
)
 
$
377




Other intangible assets are amortized on a straight-line basis over their estimated lives, which range from eight and a half years to twelve years. Amortization expenses related to intangibles totaled $812 thousand in 2017, $92 thousand in 2016 and $92 thousand in 2015.

The estimated aggregate future amortization expense for intangible assets remaining at year-end 2017 is as follows: 2018- $827 thousand; 2019- $827 thousand; 2020- $827 thousand; 2021- $742 thousand; 2022- $734 thousand; and thereafter- $4.4 million. For the years 2017, 2016 and 2015, no impairment charges were identified for the Company's intangible assets.