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Goodwill and other intangible assets
3 Months Ended
Mar. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and other intangible assets
Goodwill and other intangible assets

The Company recorded $3.3 million of goodwill in connection with the PPFS merger. The Company recorded $4.0 million of goodwill in connection with the branch acquisition. The Company recorded $78.6 million of goodwill in connection with the Home merger.

In accordance with the Intangibles - Goodwill and Other topic of the Financial Accounting Standards Board (“FASB”) ASC, goodwill is not amortized but is reviewed for potential impairment at the reporting unit level. Management analyzes its goodwill for impairment on an annual basis and between annual tests in certain circumstances, such as upon material adverse changes in legal, business, regulatory and economic factors. An impairment loss is recorded to the extent that the carrying amount of goodwill exceeds its implied fair value. The Company performed an impairment assessment as of December 31, 2016 and 2015 and concluded that there was no impairment to goodwill.

Core deposit intangibles (“CDI”) are evaluated for impairment if events and circumstances indicate a possible impairment. The CDI are amortized on a straight-line basis over an estimated life of 10 years. The following table sets forth activity for CDI for the three months ended March 31, 2017 and 2016 (dollars in thousands).
 
Three months ended March 31,
 
2017
 
2016
Gross CDI balance, beginning of period
$
14,966

 
$
8,196

Accumulated amortization, beginning of period
(2,649
)
 
(1,333
)
CDI, net, beginning of period
12,317

 
6,863

Established through acquisitions

 
6,427

CDI current period amortization
(374
)
 
(205
)
Total CDI, end of period
$
11,943

 
$
13,085



The following table provides the estimated future amortization expense of CDI for the remaining period ending December 31, 2017 and the succeeding four years (dollars in thousands):

Years Ending December 31,
 
 
2017
 
$
1,122

2018
 
1,497

2019
 
1,497

2020
 
1,497

2021
 
1,497