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Long Term Debt - Additional Information (Detail) - USD ($)
3 Months Ended 9 Months Ended
Jul. 31, 2018
Dec. 31, 2018
Mar. 31, 2019
Mar. 31, 2018
[1]
Jun. 30, 2018
Dec. 23, 2016
Debt Instrument [Line Items]            
Aggregate principal amount of loan     $ 265,200,000   $ 10,000,000  
Long term debt, net     263,400,000   $ 9,300,000 [1]  
Principal repayment     85,000,000 $ 83,000,000    
Revolving Credit Facility [Member]            
Debt Instrument [Line Items]            
Principal repayment     $ 85,000,000      
Additional borrowings   $ 50,000,000        
Revolving Credit Facility [Member] | Amendment to Credit Agreement [Member]            
Debt Instrument [Line Items]            
Aggregate principal amount of loan $ 300,000,000          
Upfront fees 1,800,000          
Debt issuance costs 300,000          
Long term debt, net 263,400,000          
Scheduled principal payments prior to maturity date $ 0          
Revolving Credit Facility [Member] | Counsyl Inc [Member] | Amendment to Credit Agreement [Member]            
Debt Instrument [Line Items]            
Loan agreement, maturity date Jul. 31, 2023          
Loans maximum borrowing capacity $ 350,000,000         $ 300,000,000
[1] Amounts adjusted due to the adoption of Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (Topic 606). See Note 1 to the financial statements contained in Part I, Item 1 of this report for additional information.