Intangible Assets (Tables)

12 Months Ended

Dec. 31, 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 Statements of Condition:

	December 31, 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 (a)	$	160,650	$	(8,176	)	$	152,474	$	16,850	$	(4,721	)	$	12,129
Customer relationships (a)	77,865		(50,777		)	27,088		54,865		(46,302		)	8,563
Other (a) (b)	5,622		(795		)	4,827		555		(230		)	325
Total	$	244,137	$	(59,748	)	$	184,389	$	72,270	$	(51,253	)	$	21,017

(a) 2017 increase primarily associated with the CBF and/or Coastal acquisitions.

(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 December 31, 2017 the estimated aggregated amortization expense is expected to be:

(Dollars in thousands)
Year	Amortization
2018	$	26,174
2019	25,108
2020	21,422
2021	19,787
2022	17,631

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 Statements of Condition as of December 31, 2017 ,2016 and 2015.

(Dollars in thousands)	Regional Banking		Fixed Income		Total
December 31, 2014	$	47,928	$	98,004	$	145,932
Additions	45,375		—		45,375
December 31, 2015	$	93,303	$	98,004	$	191,307
Additions	64		—		64
December 31, 2016	$	93,367	$	98,004	$	191,371
Additions (a)	1,150,518		44,964		1,195,482
December 31, 2017	$	1,243,885	$	142,968	$	1,386,853

(a) See Note 2 - Acquisitions and Divestitures for further details regarding goodwill related to acquisitions.