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Fair Value (Tables)
3 Months Ended
Jul. 31, 2017
Fair Value Disclosures [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
The carrying amounts and estimated fair values of our financial instruments are as follows:
(in 000s)
 
As of
 
July 31, 2017
 
July 31, 2016
 
April 30, 2017
 
 
Carrying
Amount

 
Estimated
Fair Value

 
Carrying
Amount

 
Estimated
Fair Value

 
Carrying
Amount

 
Estimated
Fair Value

Assets:
 
 
 
 
 
 
 
 
 
 
 
 
Cash and cash equivalents
 
$
551,566

 
$
551,566

 
$
306,871

 
$
306,871

 
$
1,011,331

 
$
1,011,331

Cash and cash equivalents - restricted
 
116,594

 
116,594

 
122,025

 
122,025

 
106,208

 
106,208

Receivables, net - short-term
 
91,004

 
91,004

 
103,425

 
103,425

 
162,775

 
162,775

Receivables, net - long-term
 
60,945

 
60,945

 
56,514

 
56,514

 
52,898

 
52,898

Liabilities:
 
 
 
 
 
 
 
 
 
 
 
 
Long-term debt (excluding debt issuance costs)
 
1,502,694

 
1,595,945

 
1,502,747

 
1,606,364

 
1,502,735

 
1,569,033

Contingent consideration
 
9,125

 
9,125

 
8,347

 
8,347

 
10,428

 
10,428