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Goodwill and Intangible Assets | 9 Months Ended
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Sep. 30, 2015
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Intangible Assets | Goodwill and Other Intangible Assets In accordance with the Intangibles – Goodwill and Other topic of the 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 on July 31 and between annual tests in certain circumstances such as 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 July 31, 2015 and concluded that there was no impairment. The core deposit intangible (“CDI”) is evaluated for impairment if events and circumstances indicate a possible impairment. The CDI is amortized on an accelerated basis over an estimated life of 10 years. The following table sets forth activity for goodwill and other intangible assets for the periods indicated:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
|  | 2015 |  | 2014 |  | 2015 |  | 2014
|  | (in thousands)
Goodwill |  |  |  |  |  |  |  |
Goodwill at beginning of period (1) |  | $ | 382,537 |  |  | $ | 343,952 |  |  | $ | 382,537 |  |  | $ | 343,952 |
Provisional period adjustments (1) |  | 225 |  |  | — |  |  | 225 |  |  | — |
Total goodwill (1) |  | 382,762 |  |  | 343,952 |  |  | 382,762 |  |  | 343,952 |
Other intangible assets, net |  |  |  |  |  |  |  |
Core deposit intangible: |  |  |  |  |  |  |  |
Gross core deposit intangible balance at beginning of period (1) |  | 58,598 |  |  | 47,698 |  |  | 58,598 |  |  | 47,698 |
Accumulated amortization at beginning of period |  | (32,593 | ) |  | (25,825 | ) |  | (29,058 | ) |  | (22,765 | )
Core deposit intangible, net at beginning of period |  | 26,005 |  |  | 21,873 |  |  | 29,540 |  |  | 24,933 |
CDI current period amortization |  | (1,695 | ) |  | (1,456 | ) |  | (5,230 | ) |  | (4,516 | )
Total core deposit intangible, net at end of period |  | 24,310 |  |  | 20,417 |  |  | 24,310 |  |  | 20,417 |
Intangible assets not subject to amortization |  | 919 |  |  | 919 |  |  | 919 |  |  | 919 |
Other intangible assets, net at end of period |  | 25,229 |  |  | 21,336 |  |  | 25,229 |  |  | 21,336 |
Total goodwill and other intangible assets at end of period |  | $ | 407,991 |  |  | $ | 365,288 |  |  | $ | 407,991 |  |  | $ | 365,288 |
__________ (1) See Note 3, Business Combinations, for additional information regarding goodwill and intangible assets recorded related to the acquisition of Intermountain on November 1, 2014. The following table provides the estimated future amortization expense of core deposit intangibles for the remaining three months ending December 31, 2015 and the succeeding four years:
|  | Amount
|  | (in thousands)
Year ending December 31, |  |
2015 |  | $ | 1,653 |
2016 |  | 5,945 |
2017 |  | 4,913 |
2018 |  | 3,855 |
2019 |  | 2,951 |

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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 -SubTopic 30 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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