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Other Intangible Assets
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Other Intangible Assets
OTHER INTANGIBLE ASSETS (Dollars In Thousands)

The following table presents information on Arrow’s other intangible assets (other than goodwill) as of December 31, 2017, 2016 and 2015:
 
Depositor
Intangibles1
 
Mortgage
Servicing
Rights2
 
Customer Intangibles1
 
Total  
Gross Carrying Amount, December 31, 2017
$
2,247

 
$
2,061

 
$
4,382

 
$
8,690

Accumulated Amortization
(2,247
)
 
(1,624
)
 
(2,530
)
 
(6,401
)
Net Carrying Amount, December 31, 2017
$
—

 
$
437

 
$
1,852

 
$
2,289

Gross Carrying Amount, December 31, 2016
$
2,247

 
$
1,968

 
$
4,382

 
$
8,597

Accumulated Amortization
(2,247
)
 
(1,403
)
 
(2,251
)
 
(5,901
)
Net Carrying Amount, December 31, 2016
$
—

 
$
565

 
$
2,131

 
$
2,696

 
 
 
 
 
 
 
 
Rollforward of Intangible Assets:
 
 
 
 
 
 
 
Balance, December 31, 2014
$
10

 
$
832

 
$
2,783

 
$
3,625

Intangible Assets Acquired
—

 
107

 
—

 
107

Intangible Assets Disposed
—

 
—

 
(38
)
 
(38
)
Amortization of Intangible Assets
(10
)
 
(260
)
 
(317
)
 
(587
)
Balance, December 31, 2015
—

 
679

 
2,428

 
3,107

Intangible Assets Acquired
—

 
146

 
—

 
146

Intangible Assets Disposed
—

 
—

 
—

 
—

Amortization of Intangible Assets
—

 
(260
)
 
(297
)
 
(557
)
Balance, December 31, 2016
—

 
565

 
2,131

 
2,696

Intangible Assets Acquired
—

 
93

 
—

 
93

Intangible Assets Disposed
—

 
—

 
—

 
—

Amortization of Intangible Assets
—

 
(221
)
 
(279
)
 
(500
)
Balance, December 31, 2017
$
—

 
$
437

 
$
1,852

 
$
2,289


1 Amortization of depositor intangibles and customer intangibles are reported in the Consolidated Statements of Income as a component of other operating expense.
2 Amortization of mortgage servicing rights is reported in the Consolidated Statements of Income as a reduction of mortgage servicing fee income, which is included with fees for other services to customers.

The following table presents the remaining estimated annual amortization expense for Arrow's intangible assets as of December 31, 2017:
 
 
Mortgage
Servicing
Rights
 
Customer Intangibles
 
Total
Estimated Annual Amortization Expense:
 
 
 
 
 
 
2018
 
$
176

 
$
262

 
$
438

2019
 
102

 
245

 
347

2020
 
71

 
227

 
298

2021
 
50

 
210

 
260

2022
 
29

 
193

 
222

2023 and beyond
 
9

 
715

 
724

Total
 
$
437

 
$
1,852

 
$
2,289