Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2018

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:

	March 31, 2018							December 31, 2017
(Dollars in thousands)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Value		Gross Carrying Amount		Accumulated Amortization			Net Carrying Value
Core deposit intangibles (a)	$	157,150	$	(13,144	)	$	144,006	$	160,650	$	(8,176	)	$	152,474
Customer relationships	77,865		(52,018		)	25,847		77,865		(50,777		)	27,088
Other (b)	5,622		(1,060		)	4,562		5,622		(795		)	4,827
Total	$	240,637	$	(66,222	)	$	174,415	$	244,137	$	(59,748	)	$	184,389

(a) 2018 decrease in gross carrying amounts associated with the sale of two CBF branches and purchase accounting measurement period adjustments related to the CBF acquisition. See Note 2 - Acquisitions and Divestitures for additional information.

(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 March 31, 2018 the estimated aggregated amortization expense is expected to be:

(Dollars in thousands)
Year	Amortization
Remainder of 2018	$	19,391
2019	24,834
2020	21,159
2021	19,547
2022	17,412
2023	16,117

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 March 31, 2018 and December 31, 2017.

(Dollars in thousands)	Regional Banking		Fixed Income		Total
December 31, 2016	$	93,367	$	98,004	$	191,371
Additions	—		—		—
March 31, 2017	$	93,367	$	98,004	$	191,371
December 31, 2017	$	1,243,885	$	142,968	$	1,386,853
Additions (a)	11,648		—		11,648
March 31, 2018	$	1,255,533	$	142,968	$	1,398,501

(a) 2018 increase associated with measurement period adjustments for the CBF acquisition.  See Note 2 - Acquisitions and Divestitures for additional information.