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Deferred Revenue (Tables)
 12 Months Ended
Mar. 31, 2018
Deferred Revenue Disclosure [Abstract]  
Reconciliation of the Changes in Deferred Revenue
The following is a reconciliation of the changes in deferred revenue for 2018, 2017 and 2016:
(In thousands)
2018
 
2017
 
2016
Deferred revenue, beginning
$
15,397

 
$
7,685

 
$
12,376

Revenue deferred
82,394

 
43,379

 
58,416

Revenue recognized
(87,277
)
 
(35,667
)
 
(63,107
)
Deferred revenue, ending
$
10,514

 
$
15,397

 
$
7,685