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Intangible Assets
9 Months Ended
Sep. 30, 2016
Goodwill And Intangible Assets Disclosure [Abstract]  
Intangible Assets

Note 6Intangible Assets

The following is a summary of goodwill and other intangible assets, net of accumulated amortization, included in the Consolidated Condensed Statements of Condition:
  Other
Intangible
(Dollars in thousands)GoodwillAssets (a)
December 31, 2014  $145,932$29,518
Amortization expense-(3,894)
September 30, 2015$145,932$25,624
December 31, 2015 (b)$191,307$26,215
Amortization expense  -(3,898)
Additions64-
September 30, 2016  $191,371$22,317

  • Represents customer lists, acquired contracts, core deposit intangibles, and covenants not to compete.
  • The increase in goodwill was related to the TAF acquisition in fourth quarter 2015.

The gross carrying amount and accumulated amortization of other intangible assets subject to amortization is $72.3 million and $50.0 million, respectively on September 30, 2016. Estimated aggregate amortization expense is expected to be $1.3 million for the remainder of 2016, and $4.9 million, $4.7 million, $4.5 million, $1.7 million, and $1.6 million for the twelve-month periods of 2017, 2018, 2019, 2020, and 2021, respectively.

Gross goodwill, accumulated impairments, and accumulated divestiture related write-offs were determined beginning January 1, 2012, when a change in accounting requirements resulted in goodwill being assessed for impairment rather than being amortized. Gross goodwill of $200.0 million with accumulated impairments and accumulated divestiture related write-offs of $114.1 million and $85.9 million, respectively, were previously allocated to the non-strategic segment, resulting in $0 net goodwill allocated to the non-strategic segment as of September 30, 2015 and 2016. The regional bank and fixed income segments do not have any accumulated impairments or divestiture related write-offs. The following is a summary of goodwill by reportable segment included in the Consolidated Condensed Statements of Condition as of and for the nine months ended September 30, 2015 and 2016.

Regional  Fixed  
(Dollars in thousands)BankingIncomeTotal
December 31, 2014$47,928  $98,004  $145,932
Additions-  -  -
Impairments-  -  -
Divestitures---
September 30, 2015$47,928  $98,004  $145,932
December 31, 2015 (a)$93,303  $98,004  $191,307
Additions64  -  64
Impairments---
Divestitures---
September 30, 2016$93,367  $98,004  $191,371
(a)          The increase in goodwill was related to the TAF acquisition in fourth quarter 2015.