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Goodwill And Other Intangible Assets
12 Months Ended
Dec. 31, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets Disclosure [Text Block]
.
GOODWILL AND OTHER INTANGIBLE ASSETS
Core deposit and other intangible assets and related accumulated amortization are as follows at December 31:
 
Gross carrying amount
 
Accumulated amortization
 
Net carrying amount
(In thousands)
2016
 
2015
 
2016
 
2015
 
2016
 
2015
 
 
 
 
 
 
 
 
 
 
 
 
Core deposit intangibles
$
166,518

 
$
166,518

 
$
(158,444
)
 
$
(151,157
)
 
$
8,074

 
$
15,361

Customer relationships and other intangibles
28,014

 
28,014

 
(27,668
)
 
(27,103
)
 
346

 
911

Total
$
194,532

 
$
194,532

 
$
(186,112
)
 
$
(178,260
)
 
$
8,420

 
$
16,272


The amount of amortization expense of core deposit and other intangible assets is separately reflected in the statement of income.
Estimated amortization expense for core deposit and other intangible assets is as follows for the five years succeeding December 31, 2016:
(In thousands)
 
 
 
2017
$
6,404

2018
1,557

2019
459

2020

2021


Changes in the carrying amount of goodwill for operating segments with goodwill are as follows:
(In thousands)
Zions Bank
 
CB&T
 
Amegy
 
Consolidated Company
 
 
 
 
 
 
 
 
Balance at December 31, 2014
$
19,514

 
$
379,024

 
$
615,591

 
$
1,014,129

Impairment losses

 

 

 

Balance at December 31, 2015
19,514

 
379,024

 
615,591

 
1,014,129

Impairment losses

 

 

 

Balance at December 31, 2016
$
19,514

 
$
379,024

 
$
615,591

 
$
1,014,129


A company-wide annual impairment test is conducted as of October 1 of each year and updated on a more frequent basis when events or circumstances indicate that impairment could have taken place. Results of the testing for 2016 and 2015 concluded that no impairment was present in any of the operating segments.