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Income Taxes (Details) - USD ($)
$ in Thousands
 3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Mar. 31, 2017
Income Tax Disclosure [Line Items]      
Provision for (benefit from) income taxes $ (5,436) $ 3,057  
Effective income tax rates (17.20%) 12.20%  
Excess tax benefits $ 9,900    
Increase to federal tax credit carryfoward valuation allowance 1,300    
Lapse of statute of limitations 700 $ 700  
Unrecognized tax benefits 65,000   $ 63,700
Accrued interest and penalties related to uncertain tax positions 3,200   3,000
Expected decrease in uncertain tax positions 8,500    
Non-current income tax payable      
Income Tax Disclosure [Line Items]      
Unrecognized tax benefits 32,100   51,800
Current income tax payable      
Income Tax Disclosure [Line Items]      
Unrecognized tax benefits 1,500   $ 1,500
Settlement with Taxing Authority      
Income Tax Disclosure [Line Items]      
Tax settlement, foreign jurisdiction $ 1,400