XML 49 R37.htm IDEA: XBRL DOCUMENT v3.7.0.1
Fair Value of Financial Instruments and Long Term Debt - Schedule of Maturities of Long-Term Debt Including Capitalizied Leases (Details) - USD ($)
$ in Thousands
Apr. 30, 2017
Apr. 30, 2016
Debt Instrument    
2018 $ 15,421  
2019 15,444  
2020 15,468  
2021 569,494  
2022 455  
Thereafter 306,495  
Long-term debt 922,777 $ 838,244
Capital Leases    
Debt Instrument    
2018 421  
2019 444  
2020 468  
2021 494  
2022 455  
Thereafter 6,495  
Long-term debt 8,777  
Senior Notes    
Debt Instrument    
2018 15,000  
2019 15,000  
2020 15,000  
2021 569,000  
2022 0  
Thereafter 300,000  
Long-term debt $ 914,000