Basis of Presentation and New Accounting Pronouncements (Policies)	9 Months Ended
	Dec. 31, 2019
Basis of Presentation and New Accounting Pronouncements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) for interim financial information and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three and nine months ended December 31, 2019 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2020. This report should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the fiscal year ended March 31, 2019, which are included in the Company’s Annual Report on Form 10-K filed with the Securities and Exchange Commission (“SEC”) on June 28, 2019. The accompanying condensed consolidated financial statements have been prepared on a consistent basis with, and there have been no material changes to, except as noted below, the accounting policies described in Note 3, Summary of Significant Accounting Policies, to the consolidated financial statements that are presented in the Company’s Annual Report on Form 10-K for the fiscal year ended March 31, 2019.
New Accounting Pronouncements Recently Adopted	New Accounting Pronouncements Recently Adopted Leases In February 2016, the FASB issued new guidance that requires balance sheet recognition of a lease asset and lease liability by lessees for all leases, other than leases with a term of 12 months or less if the short-term lease exclusion expedient is elected. The new guidance also requires new disclosures providing additional qualitative and quantitative information about the amounts recorded in the financial statements. The new guidance requires a modified retrospective approach with optional practical expedients. The FASB provided entities with an additional transition method, which allows an entity to apply this guidance as of the beginning of the period of adoption instead of the beginning of the earliest comparative period presented in the entity’s financial statements. The Company adopted this guidance on April 1, 2019 using the additional transition method. The Company also elected certain practical expedients permitted under the transition guidance, including the package of practical expedients, which allowed it not to reassess lease classification for leases that commenced prior to the adoption date. In addition, the Company elected to exempt leases with an initial term of 12 months or less from balance sheet recognition and, for all classes of assets, combining non-lease components with lease components. Upon adoption, the Company recorded operating lease liabilities of $53,043,000 and corresponding operating lease assets of $50,773,000. The difference between the operating lease assets and liabilities recognized on the Company’s condensed consolidated balance sheets primarily related to accrued rent on existing leases that were offset against the operating lease asset upon adoption. There was an immaterial reclassification of non-lease components to finance lease assets and finance lease liabilities upon adoption due to the Company’s election to combine non-lease components with lease components. The adoption of the new guidance did not have any impact on the Company’s rent expense and condensed consolidated statement of cash flows. However, the Company has material nonfunctional currency leases that could have a material impact on the Company’s condensed consolidated statements of operations. As required for other monetary liabilities, lessees shall remeasure a foreign currency-denominated lease liability using the exchange rate at each reporting date, but the lease assets are nonmonetary assets measured at historical rates, which are not affected by subsequent changes in the exchange rates. The Company recorded gains of $2,128,000 and $1,491,000 in general and administrative expenses in connection with the remeasurement of foreign currency-denominated lease liabilities during the three and nine months ended December 31, 2019, respectively. See Note 9 for additional discussion of the adoption of ASC 842 and the impact on the Company’s financial statements.
New Accounting Pronouncements Not Yet Adopted	New Accounting Pronouncements Not Yet Adopted Measurement of Credit Losses on Financial Instruments In June 2016, the FASB issued an accounting pronouncement related to the measurement of credit losses on financial instruments. This pronouncement, along with a subsequent Accounting Standards Updates (“ASU”) issued to clarify certain provisions of the new guidance, changes the impairment model for most financial assets and will require the use of an “expected loss” model for instruments measured at amortized cost. Under this model, entities will be required to estimate the lifetime expected credit loss on such instruments and record an allowance to offset the amortized cost basis of the financial asset, resulting in a net presentation of the amount expected to be collected on the financial asset. This pronouncement is effective for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019. The Company plans to adopt this pronouncement for its fiscal year beginning April 1, 2020. The Company is currently evaluating the impact of the adoption of this guidance and it is currently not expected to have any material impact on its consolidated financial statements, business processes, systems and internal controls. Fair Value Measurements In August 2018, the FASB issued guidance, which changes the disclosure requirements for fair value measurements by removing, adding and modifying certain disclosures. The standard is effective for financial statements issued for fiscal years, and for interim periods within those fiscal years, beginning after December 15, 2019. Early adoption is permitted. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements. Income Taxes In December 2019, the FASB issued guidance that simplifies the accounting for income taxes, eliminates certain exceptions within ASC 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistent application. This guidance is effective for annual and interim periods in fiscal years beginning after December 15, 2020. Early adoption is permitted. The Company is currently evaluating the impact this guidance will have on its consolidated financial statements.