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Accumulated Other Comprehensive Income (Loss) (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Schedule of Accumulated Other Comprehensive Income (Loss) The following table sets forth the changes in accumulated other comprehensive income (loss), net of tax (in thousands) for the periods presented:
 
 
Unrealized Gain (Loss) on Available-for-Sale Securities
 
Gain (loss) on Derivative Securities
 
Foreign Currency Translation Adjustments
 
Accumulated Other Comprehensive Income (Loss)
Balance, January 1, 2015
 
$
(18
)
 
$
—

 
$
(290
)
 
$
(308
)
Current period other comprehensive income (loss)
 
2

 
—

 
(1,021
)
 
(1,019
)
Balance, December 31, 2015
 
(16
)
 
—

 
(1,311
)
 
(1,327
)
Current period other comprehensive income (loss) before reclassifications
 
8

 
(450
)
 
126

 
(316
)
Reclassification of amounts to earnings
 
—

 
426

 
—

 
426

Net other comprehensive income (loss) during period
 
8

 
(24
)
 
126

 
110

Balance, December 31, 2016
 
(8
)
 
(24
)
 
(1,185
)
 
(1,217
)
Current period other comprehensive income (loss) before reclassifications
 
(56
)
 
80

 
774

 
798

Reclassification of amounts to earnings
 
—

 
160

 
—

 
160

Net other comprehensive income (loss) during period
 
(56
)
 
240

 
774

 
958

Balance, December 31, 2017
 
$
(64
)
 
$
216

 
$
(411
)
 
$
(259
)