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Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Summary Of Intangible Assets and Accumulated Amortization Included In The Consolidated Statements of Condition | The following is a summary of other intangible assets included in the Consolidated Condensed Statements of Condition:
|  | September 30, 2017 |  | December 31, 2016
(Dollars in thousands) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Value
Core deposit intangibles |  | $ | 16,850 |  |  | $ | (6,154 | ) |  | $ | 10,696 |  |  | $ | 16,850 |  |  | $ | (4,721 | ) |  | $ | 12,129 |
Customer relationships (a) |  | 76,865 |  |  | (49,496 | ) |  | 27,369 |  |  | 54,865 |  |  | (46,302 | ) |  | 8,563 |
Other (a) (b) |  | 5,622 |  |  | (530 | ) |  | 5,092 |  |  | 555 |  |  | (230 | ) |  | 325 |
Total |  | $ | 99,337 |  |  | $ | (56,180 | ) |  | $ | 43,157 |  |  | $ | 72,270 |  |  | $ | (51,253 | ) |  | $ | 21,017 |
(a) | 2017 increase associated with the Coastal acquisition.
(b) | Balance primarily includes noncompete covenants, as well as $.3 million related to state banking licenses not subject to amortization.
Schedule of Estimated Aggregate Amortization Expense for Intangible Assets | As of September 30, 2017 the estimated aggregated amortization expense is expected to be:
(Dollars in thousands) |  |
Year |  | Amortization
Remainder of 2017 |  | $ | 1,964 |
2018 |  | 7,483 |
2019 |  | 7,179 |
2020 |  | 4,303 |
2021 |  | 4,123 |
2022 |  | 3,356 |
Summary Of Gross Goodwill And Accumulated Impairment Losses And Write-Offs Detailed By Reportable Segments | The following is a summary of goodwill by reportable segment included in the Consolidated Condensed Statements of Condition as of September 30, 2017 and December 31, 2016.
(Dollars in thousands) |  | Regional Banking |  | Fixed Income |  | Total
December 31, 2015 |  | $ | 93,303 |  |  | $ | 98,004 |  |  | $ | 191,307 |
Additions |  | 64 |  |  | — |  |  | 64 |
September 30, 2016 |  | $ | 93,367 |  |  | $ | 98,004 |  |  | $ | 191,371 |
December 31, 2016 |  | $ | 93,367 |  |  | $ | 98,004 |  |  | $ | 191,371 |
Additions (a) |  | — |  |  | 44,964 |  |  | 44,964 |
September 30, 2017 |  | $ | 93,367 |  |  | $ | 142,968 |  |  | $ | 236,335 |
(a) See Note 2 - Acquisitions and Divestitures for further details regarding goodwill related to acquisitions.

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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