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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL AND OTHER INTANGIBLE ASSETS | GOODWILL AND OTHER INTANGIBLE ASSETS The following table presents goodwill as of the dates presented:
| December 31,
(dollars in thousands) | 2017 |  | 2016
Balance at beginning of year | $ | 291,670 |  |  | $ | 291,764 |
Additions | — |  |  | — |
Other adjustments | — |  |  | $ | (94 | )
Balance at End of Year | $ | 291,670 |  |  | $ | 291,670 |
Goodwill represents the excess of the purchase price over the fair value of net assets acquired. Purchase accounting guidance allows for a reasonable period of time following an acquisition for the acquirer to obtain the information necessary to complete the accounting for a business combination. This period is known as the measurement period. Additional measurement period purchase accounting adjustments, primarily related to taxes from the Merger, decreased goodwill by less than $0.1 million in 2016. Goodwill is reviewed for impairment annually or more frequently if it is determined that a triggering event has occurred. Based upon our qualitative assessment performed for our annual impairment analysis, we concluded that it is more likely than not that the fair value of the reporting units exceeds the carrying value. In general, the overall macroeconomic conditions and more specifically the economic conditions of the banking industry have been very good. Additionally, our overall performance has been good and we did not identify any other facts and circumstances causing us to conclude that it is more likely than not that the fair value of the reporting units would be less than the carrying value. The following table shows a summary of intangible assets as of the dates presented:
| December 31,
(dollars in thousands) | 2017 |  | 2016
Gross carrying amount at beginning of year | $ | 22,114 |  |  | $ | 22,114 |
Additions | — |  |  | — |
Accumulated amortization | (18,437 | ) |  | (17,204 | )
Balance at End of Year | $ | 3,677 |  |  | $ | 4,910 |
Intangible assets as of December 31, 2017 consisted of $3.4 million for core deposits and $0.3 million for insurance contract relationships resulting from acquisitions. We determined the amount of identifiable intangible assets based upon independent core deposit, wealth management and insurance contract valuations. Other intangible assets are evaluated for impairment whenever events or changes in circumstances indicate that their carrying amounts may not be recoverable. There were no triggering events in 2017 requiring an impairment analysis to be completed. Amortization expense on finite-lived intangible assets totaled $1.2 million, $1.6 million and $1.8 million for 2017, 2016 and 2015. The following is a summary of the expected amortization expense for finite-lived intangible assets, assuming no new additions, for each of the five years following December 31, 2017 and thereafter:
(dollars in thousands) | Amount |
2018 | $ | 1,013 |
2019 | 655 |
2020 | 554 |
2021 | 477 |
2022 | 359 |
Thereafter | 619 |
Total | $ | 3,677 |

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- Definition The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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