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Goodwill and Other Intangible Assets
12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Other Intangible Assets
GOODWILL AND OTHER INTANGIBLE ASSETS
Other intangible assets and related accumulated amortization consists of the following at December 31:
 
2017
 
2016
Gross carrying amount of acquisition intangibles:
 
 
 
Customer related intangibles
$
187,717

 
$
186,231

Acquired software
179,466

 
176,096

Trade names
11,435

 
11,065

Leases acquired
3,694

 
3,694

 
382,312

 
377,086

Accumulated amortization
(145,868
)
 
(109,827
)
Total intangibles, net
$
236,444

 
$
267,259


 
Total amortization expense for intangibles was $36.0 million in 2017, $36.4 million in 2016, and $10.3 million during 2015.
 
The allocation of acquisition intangible assets is summarized in the following table:
 
December 31, 2017
 
December 31, 2016
 
Gross
Carrying
Amount
 
Weighted
Average
Amortization
Period
 
Accumulated Amortization
 
Gross
Carrying
Amount
 
Weighted
Average
Amortization
Period
 
Accumulated Amortization
Non-amortizable intangibles:
 
 
 
 
 
 
 
 
 
 
 
Goodwill
$
657,987

 

 
$

 
$
650,237

 

 
$

Amortizable intangibles:
 
 
 
 
 
 
 
 
 
 
 
Customer related intangibles
187,717

 
15 years

 
64,375

 
186,231

 
15 years

 
51,491

Acquired software
179,466

 
7 years

 
76,800

 
176,096

 
7 years

 
55,115

Trade names
11,435

 
11 years

 
3,768

 
11,065

 
12 years

 
2,740

Leases acquired
3,694

 
10 years

 
925

 
3,694

 
9 years

 
481



The changes in the carrying amount of goodwill for the two years ended December 31, 2017 are as follows:
 
Enterprise
Software
 
Appraisal
 and Tax
 
Total
Balance as of 12/31/2015
$
647,109

 
$
6,557

 
$
653,666

Goodwill acquired with acquisitions
3,943

 

 
3,943

Purchase price adjustments related to purchase of NWS
(7,372
)
 

 
(7,372
)
Balance as of 12/31/2016
643,680

 
6,557

 
650,237

Goodwill acquired with acquisitions
7,750

 

 
7,750

Balance as of 12/31/2017
$
651,430

 
$
6,557

 
$
657,987


 
Estimated annual amortization expense related to acquired leases will be recorded as a reduction to hardware and other revenue and is expected to be $425,000 in 2018, $373,000 in 2019, $313,000 in 2020, $312,000 in 2021, $312,000 in 2022 and $1.0 million thereafter. Estimated annual amortization expense related to acquisition intangibles, including acquired software, for which the amortization expense is recorded as cost of revenues, is as follows:
2018
$
35,278

2019
33,920

2020
32,495

2021
32,136

2022
28,665