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Schedule II - Valuation and Qualifying Accounts [Schedule]
 12 Months Ended
Dec. 31, 2018
Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS
Tax-related valuation allowance
Balance at the beginning of period
 
Charged to tax expense/(benefit)
 
Purchase accounting adjustments
 
Impact of foreign currency exchange rate
 
Balance at the end of period
Year ended December 31, 2018
$
33,774

 
$
6,814

 
$
269

 
$
—

 
$
40,857

Year ended December 31, 2017
28,211

 
5,557

 
—

 
6

 
33,774

Year ended December 31, 2016
8,274

 
19,962

 
—

 
(25
)
 
28,211