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Accumulated Other Comprehensive Income (Loss) (Tables)
 3 Months Ended
Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]  
Schedule Of Accumulated Other Comprehensive Income (Loss), Net Of Tax
The components of Accumulated other comprehensive loss, net of tax, are as follows: 
 
Foreign
Currency
Translation
Adjustments
 
Unrealized
Gains (Losses)
on Investments
 
Accumulated Other Comprehensive Loss
Balance, January 1, 2017
$
(37,119
)
 
$
(836
)
 
$
(37,955
)
 
 
 
 
 
 
Other comprehensive gain before reclassifications
2,488

 
(24
)
 
2,464

Amounts reclassified from accumulated other comprehensive loss
—

 
(22
)
 
(22
)
Net current-period other comprehensive gain
2,488

 
(46
)
 
2,442

 
 
 
 
 
 
Balance, March 31, 2017
$
(34,631
)
 
$
(882
)
 
$
(35,513
)