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Goodwill And Other Intangible Assets (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2019
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 452,390 | $ 452,390 | $ 497,267 | $ 57,315 |
Finite-lived core deposits | $ 37,600 | 37,600 |  |  |
Percent of Income-Based Discounted Cash Flow Approach Used | 60.00% |  |  |  |
Percent of Market-Based Approach Used | 40.00% |  |  |  |
Goodwill impairment |  | 44,877 | 0 | 0 |
Consumer Mortgages Reporting Unit |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill | $ 0 | 0 | 44,877 | 3,123 |
Goodwill impairment |  | 44,877 |  |  |
FCB Financial Holdings, Inc. |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Goodwill |  |  |  |  | $ 440,000
Core deposit intangible |  |  |  |  | $ 57,400
Global One |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Amortization of intangibles |  | $ 10,600 | $ 11,600 | $ 1,200 |
CDI | FCB Financial Holdings, Inc. |  |  |  |  |
Goodwill [Line Items] |  |  |  |  |
Finite-lived intangible asset, useful life |  | 10 years |  |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Bank deposits belonging to an acquired bank that can be counted on as a stable source of lending funds. These deposits have the following attributes: predictable costs and low sensitivity to interest rates. This intangible asset is usually amortized over its estimated useful life. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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