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Goodwill and Other Intangible Assets
 3 Months Ended
Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
GOODWILL AND OTHER INTANGIBLE ASSETS
Goodwill
Changes to the carrying amount of goodwill by reporting unit for the three months ended March 31, 2019, and the year ended December 31, 2018 are provided in the following table:
(in thousands)
IBERIABANK
 
Mortgage
 
LTC
 
Total
Balance, December 31, 2017
$
1,160,559

 
$
23,178

 
$
5,165

 
$
1,188,902

Goodwill acquired and adjustments during the year
43,251

 
—

 
3,380

 
46,631

Balance, December 31, 2018
$
1,203,810

 
$
23,178

 
$
8,545

 
$
1,235,533

Goodwill acquired and adjustments during the year
—

 
—

 
—

 
—

Balance, March 31, 2019
$
1,203,810

 
$
23,178

 
$
8,545

 
$
1,235,533


The goodwill acquired and adjustments made during 2018 were the result of the Sabadell United, Gibraltar, and SolomonParks acquisitions. There were no changes to goodwill during the three months ended March 31, 2019.
The Company performed the required annual goodwill impairment test as of October 1, 2018. The Company’s annual impairment test did not indicate impairment in any of the Company’s reporting units as of the testing date. Following the testing date, management evaluated the events and changes that could indicate that goodwill might be impaired and concluded that a subsequent interim test was not necessary.
Mortgage Servicing Rights
Mortgage servicing rights are recorded at the lower of cost or market value in other intangible assets on the Company's consolidated balance sheets and amortized over the remaining servicing life of the loans, with consideration given to prepayment assumptions. Mortgage servicing rights had the following carrying values as of the periods indicated:
 
March 31, 2019
 
December 31, 2018
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
(in thousands)
 
 
 
 
 
Mortgage servicing rights
$
14,636

 
$
(5,102
)
 
$
9,534

 
$
13,612

 
$
(4,806
)
 
$
8,806



Title Plant
The Company held title plant assets recorded in other intangible assets on the Company's consolidated balance sheets totaling $6.8 million at both March 31, 2019 and December 31, 2018. No events or changes in circumstances occurred during the three months ended March 31, 2019 to suggest the carrying value of the title plant was not recoverable.
Intangible assets subject to amortization
Definite-lived intangible assets had the following carrying values included in other intangible assets on the Company’s consolidated balance sheets as of the periods indicated:
 
March 31, 2019
 
December 31, 2018
(in thousands)
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
 
Gross Carrying Amount
 
Accumulated Amortization
 
Net Carrying Amount
Core deposit intangible assets
$
136,183

 
$
(68,189
)
 
$
67,994

 
$
136,183

 
$
(63,213
)
 
$
72,970

Customer relationship intangible asset
1,385

 
(1,340
)
 
45

 
1,385

 
(1,323
)
 
62

Non-compete agreement
206

 
(84
)
 
122

 
206

 
(72
)
 
134

Total
$
137,774

 
$
(69,613
)
 
$
68,161

 
$
137,774

 
$
(64,608
)
 
$
73,166