Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

v3.10.0.1
Income Taxes (Details) - USD ($)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Mar. 31, 2018
Income Tax Contingency [Line Items]          
Current Income Tax Expense (Benefit) $ 2,000,000   $ 6,600,000    
Income tax expense (benefit) (1) 2,000,000 $ 2,864,000 6,600,000 $ 4,004,000  
Current State and Local Tax Expense (Benefit)     300,000    
Current Federal Tax Expense (Benefit)   100,000 200,000 200,000  
Tax Cuts & Jobs Act         $ 800,000
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount     75,300,000    
Foreign Tax Authority [Member]          
Income Tax Contingency [Line Items]          
Income tax expense (benefit) (1)   2,700,000   3,600,000  
Foreign Income Tax Expense (Benefit), Continuing Operations 2,000,000   6,700,000    
Tax Adjustments, Settlements, and Unusual Provisions $ 1,200,000   $ 300,000    
State and Local Jurisdiction [Member]          
Income Tax Contingency [Line Items]          
Income tax expense (benefit) (1)   $ 100,000   $ 200,000