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Goodwill and Intangible Assets (Tables)
 12 Months Ended
Dec. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Changes in the carrying amount of Goodwill
The changes in the carrying amount of Goodwill are as follows:
 
Goodwill
 
Accumulated
Impairment
Losses
 
Total
Balance as of December 31, 2013
$
68,906

 
$
(49,977
)
 
$
18,929

Foreign currency fluctuations
(4,048
)
 
3,474

 
(574
)
Balance as of December 31, 2014
$
64,858

 
$
(46,503
)
 
$
18,355

Foreign currency fluctuations
(4,411
)
 
2,859

 
(1,552
)
Balance as of December 31, 2015
$
60,447

 
$
(43,644
)
 
$
16,803
Acquired Intangible Assets excluding Goodwill
 
Customer Lists
and
Service Contracts
 
Trade
Name
 
Technology
 
Total
Balance as of December 31, 2015
 
 
 
 
 
 
 
Original cost
$
19,781

 
$
3,859

 
$
6,596

 
$
30,236

Accumulated amortization
(19,232
)
 
(3,859
)
 
(3,950
)
 
(27,041
)
Carrying amount
$
549

 
$
—

 
$
2,646

 
$
3,195

Weighted-average original life (in years)
15

 
14

 
13

 
 

 
 
 
 
 
 
 
 
Balance as of December 31, 2014
 

 
 

 
 

 
 

Original cost
$
21,946

 
$
4,300

 
$
6,915

 
$
33,161

Accumulated amortization
(12,099
)
 
(2,068
)
 
(3,406
)
 
(17,573
)
Carrying amount
$
9,847

 
$
2,232

 
$
3,509

 
$
15,588

Weighted-average original life (in years)
15

 
14

 
13

 
 
Estimated aggregate amortization expense of Intangible Assets
Estimated aggregate amortization expense based on the current carrying amount of amortizable Intangible Assets for each of the five succeeding years is as follows:
2016
$
407

2017
315

2018
309

2019
309

2020
309

Thereafter
1,546

Total
$
3,195