Accumulated Other Comprehensive Loss, Net of Tax
 12 Months Ended
Dec. 31, 2015
Equity [Abstract]  
Accumulated Other Comprehensive Loss, Net of Tax
3.
Accumulated Other Comprehensive Loss, Net of Tax
Amounts included in accumulated other comprehensive loss, net of tax, consisted of the following: 
 
As of December 31,
 
2015
 
2014
Fair value of interest rate swaps, net of tax
$
(826
)
 
$
(406
)
Cumulative foreign currency translation adjustment
(10,813
)
 
(9,427
)
Accumulated other comprehensive loss, net of tax
$
(11,639
)
 
$
(9,833
)