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Commitments and Contingencies | 12 Months Ended
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Apr. 30, 2017
Commitments and Contingencies | 14. Commitments and Contingencies Lease Commitments The Company leases office premises and certain office equipment under leases expiring at various dates through 2030. Total rental expense during fiscal 2017, 2016 and 2015 amounted to $56.8 million, $45.5 million and $38.0 million, respectively. Future minimum commitments under non-cancelable operating leases with lease terms in excess of one year excluding commitments accrued in the restructuring liability are as follows:
Year Ending April 30, |  | Lease Commitments |
|  | (in thousands) |
2018 |  | $ | 62,384 |
2019 |  |  | 57,812 |
2020 |  |  | 54,817 |
2021 |  |  | 50,418 |
2022 |  |  | 44,100 |
Thereafter |  |  | 145,284 |
|  | $ | 414,815 |
Employment Agreements The Company has a policy of entering into offer letters of employment or letters of promotion with vice presidents which provide for an annual base salary and discretionary and incentive bonus payments. Certain key vice presidents who typically have been employed by the Company for several years may also have a standard form employment agreement. Upon termination without cause, the Company is required to pay the amount of severance due under the employment agreement, if any. The Company also requires its vice presidents to agree in their employment letters and their employment agreement, if applicable, not to compete with the Company during the term of their employment, and for a certain period after their employment ends. Litigation From time to time, the Company has been and is involved in litigation incidental to its business. The Company is currently not a party to any litigation which, if resolved adversely against the Company, would, in the opinion of management, after consultation with legal counsel, have a material adverse effect on the Company’s business, financial position or results of operations.

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