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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Schedule of Allowance for Doubtful Accounts
Activity in the allowance for doubtful accounts was as follows:
 
 
2014
 
2013
 
2012
Balance, beginning of year
 
$
2,235

 
$
2,751

 
$
4,391

Charges to costs and expenses
 
35

 
290

 
364

Write-offs and other activity
 
(664
)
 
(838
)
 
(2,037
)
Foreign currency translation
 
(84
)
 
32

 
33

Balance, end of year
 
$
1,522

 
$
2,235

 
$
2,751