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Fair Value of Financial Instruments (Tables)
3 Months Ended
Jul. 31, 2019
Fair Value Disclosures [Abstract]  
Summary of Fair Value Hierarchy for Financial Assets and Liabilities Measured Recurring Basis
The following tables summarize the Company’s fair value hierarchy for its financial assets and liabilities measured at fair value on a recurring basis as of July 31, 2019 and April 30, 2019 (in thousands):
 
 
July 31, 2019
Financial Assets
 
Level 1
 
Level 2
 
Total
Trading securities held in non-qualified compensation plans (1)
 
$
3,116

 
$

 
$
3,116

Cash surrender value of life insurance policies (1)
 

 
76

 
76

Total
 
$
3,116

 
$
76

 
$
3,192

Financial Liabilities
 
 
 
 
 
 
Non-qualified compensation plans (2)
 
$

 
$
3,591

 
$
3,591

Interest rate swap derivatives
 

 
2

 
2

Total
 
$

 
$
3,593

 
$
3,593

 
 
April 30, 2019
Financial Assets
 
Level 1
 
Level 2
 
Total
Trading securities held in non-qualified compensation plans (1)
 
$
3,057

 
$

 
$
3,057

Cash surrender value of life insurance policies (1)
 

 
76

 
76

Total
 
$
3,057

 
$
76

 
$
3,133

Financial Liabilities
 
 
 
 
 
 
Non-qualified compensation plans (2)
 
$

 
$
3,519

 
$
3,519

Interest rate swap derivatives
 

 
1

 
1

Total
 
$

 
$
3,520

 
$
3,520

(1)
The Company maintains two non-qualified compensation plans which include investment assets in a rabbi trust. These assets consist of marketable securities, which are valued using quoted market prices multiplied by the number of shares owned, and life insurance policies, which are valued at their cash surrender value.
(2)
Plan liabilities are equal to the individual participants’ account balances and other earned retirement benefits.