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Goodwill and Core Deposit Intangibles | 12 Months Ended
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Dec. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Core Deposit Intangibles | GOODWILL AND CORE DEPOSIT INTANGIBLES Goodwill
The Company has goodwill with a carrying value of $621.6 million as of December 31, 2021 and 2020 and performed its annual goodwill impairment qualitative assessment as of July 1, 2021, 2020, and 2019 and determined the Company’s goodwill was not considered impaired. In addition, there were no events or circumstances that occurred during the second half of 2021 that would more-likely-than-not reduce the fair value of a reporting unit below its carrying value. The Company did not perform interim impairment testing as of December 31, 2021. Core deposit intangibles (“CDI”) The following table sets forth activity for identifiable core deposit intangibles subject to amortization:
Year Ended December 31, | 2021 |  | 2020 |  |
Gross CDI, beginning of period | $ | 106.0 |  |  | $ | 106.0 |  |  |
Accumulated amortization | (64.7) |  |  | (54.8) |  |  |
Net CDI, end of period | $ | 41.3 |  |  | $ | 51.2 |  |  |
Amortization expense of CDI assets was $9.9 million, $10.9 million and $11.2 million for the fiscal years ended December 31, 2021, 2020 and 2019, respectively. CDI are evaluated for impairment if events and circumstances indicate a possible impairment. The CDI are amortized using an accelerated method based on the estimated weighted average useful lives of the related deposits, which is generally ten years. The following table provides estimated future CDI amortization expense:
Years ending December 31, |
2022 | $ | 9.0 |
2023 | 8.2 |
2024 | 7.3 |
2025 | 6.5 |
2026 | 5.9 |
Thereafter | 4.4 |
Total | $ | 41.3 |

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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