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Accumulated other comprehensive loss (Tables)
 12 Months Ended
Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Abstract]  
Schedule of changes in AOCI
The changes in accumulated other comprehensive (loss) gain, by component for the years ended December 31, 2016, 2015 and 2014 are as follows:
 
Year Ended December 31, 2016
 
Foreign currency translation adjustment
 
Minimum pension liability
 
Cash flow hedge
 
Total
Balance, net of tax, beginning of year
$
(11,834
)
 
$
334

 
$
(1,069
)
 
$
(12,569
)
Other comprehensive (loss) gain, net of tax
(10,440
)
 
(484
)
 
277

 
(10,647
)
Balance, net of tax, end of year
$
(22,274
)
 
$
(150
)
 
$
(792
)
 
$
(23,216
)
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2015
 
Foreign currency translation adjustment
 
Minimum pension liability
 
Cash flow hedge
 
Total
Balance, net of tax, beginning of year
$
(8,118
)
 
$
(210
)
 
$
(228
)
 
$
(8,556
)
Other comprehensive (loss) gain, net of tax
(3,716
)
 
544

 
(841
)
 
(4,013
)
Balance, net of tax, end of year
$
(11,834
)
 
$
334

 
$
(1,069
)
 
$
(12,569
)
 
 
 
 
 
 
 
 
 
Year Ended December 31, 2014
 
Foreign currency translation adjustment
 
Minimum pension liability
 
Cash flow hedge
 
Total
Balance, net of tax, beginning of year
$
(617
)
 
$
—

 
$
—

 
$
(617
)
Other comprehensive loss, net of tax
(7,501
)
 
(210
)
 
(228
)
 
(7,939
)
Balance, net of tax, end of year
$
(8,118
)
 
$
(210
)
 
$
(228
)
 
$
(8,556
)