Other Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]    
Schedule of Finite-Lived Intangible Assets [Table Text Block]
The following table presents information on Arrow’s other intangible assets (other than goodwill) as of December 31, 2015, 2014 and 2013:
 
Depositor
Intangibles1
 
Mortgage
Servicing
Rights2
 
Customer Intangibles1
 
Total  
Gross Carrying Amount, December 31, 2015
$
2,247

 
$
1,822

 
$
4,382

 
$
8,451

Accumulated Amortization
(2,247
)
 
(1,143
)
 
(1,954
)
 
(5,344
)
Net Carrying Amount, December 31, 2015
$
—

 
$
679

 
$
2,428

 
$
3,107

Gross Carrying Amount, December 31, 2014
$
2,247

 
$
1,715

 
$
4,451

 
$
8,413

Accumulated Amortization
(2,237
)
 
(883
)
 
(1,668
)
 
(4,788
)
Net Carrying Amount, December 31, 2014
$
10

 
$
832

 
$
2,783

 
$
3,625

 
 
 
 
 
 
 
 
Rollforward of Intangible Assets:
 
 
 
 
 
 
 
Balance, December 31, 2012
$
153

 
$
859

 
$
3,480

 
$
4,492

Intangible Assets Acquired
—

 
331

 
—

 
331

Amortization of Intangible Assets
(92
)
 
(230
)
 
(361
)
 
(683
)
Balance, December 31, 2013
61

 
960

 
3,119

 
4,140

Intangible Assets Acquired
—

 
133

 
—

 
133

Amortization of Intangible Assets
(51
)
 
(261
)
 
(336
)
 
(648
)
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


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.


  
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]  
The following table presents the remaining estimated annual amortization expense for Arrow's intangible assets as of December 31, 2015:
 
 
Mortgage
Servicing
Rights2
 
Customer Intangibles1
 
Total
Estimated Annual Amortization Expense:
 
 
 
 
 
 
2016
 
$
250

 
$
293

 
$
543

2017
 
190

 
273

 
463

2018
 
136

 
256

 
392

2019
 
62

 
239

 
301

2020
 
31

 
226

 
257

Later Years
 
10

 
1,141

 
1,151

Total
 
$
679

 
$
2,428

 
$
3,107


1 Amortization of 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.