v3.8.0.1
Other Financial Statements Details Accounts Receivable (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Mar. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivable amounts $ 547,559 $ 480,457
Less allowance for doubtful accounts 2,143 2,084
Accounts receivable, net 545,416 478,373
Trade Accounts Receivable    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivable amounts 539,569 473,238
Other Receivables    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Receivable amounts $ 7,990 $ 7,219