Line of Credit	9 Months Ended
Dec. 31, 2017
Debt Disclosure [Abstract]
Line of Credit	7. Line of Credit On January 4, 2016, we entered into a $250,000 revolving credit agreement (“Credit Agreement”) with JP Morgan Chase Bank, N.A., as administrative agent, U.S. Bank National Association, as syndication agent, and certain other lenders. The Credit Agreement is secured by substantially all of our existing and future property and material domestic subsidiaries. The Credit Agreement provides a subfacility of up to $10,000 for letters of credit and a subfacility of up to $10,000 for swing-line loans. The Credit Agreement matures on January 4, 2021 and the full balance of the revolving loans and all other obligations under the agreement must be paid at that time. The revolving loans under the Credit Agreement will be available for letters of credit, working capital and general corporate purposes. We were in compliance with all covenants under the Credit Agreement as of December 31, 2017. As of December 31, 2017, we had $39,000 in outstanding loans and $211,000 of unused credit under the Credit Agreement. As of March 31, 2017, we had $15,000 in outstanding loans under the Credit Agreement. Interest expense related to the Credit Agreement was $463 and $359 for the three months ended December 31, 2017 and 2016, respectively. Amortization of deferred debt issuance costs was $269 for both the three months ended December 31, 2017 and 2016. Interest expense related to the Credit Agreement was $1,390 and $1,631 for the nine months ended December 31, 2017 and 2016, respectively. Amortization of deferred debt issuance costs was $807 for both the nine months ended December 31, 2017 and 2016, respectively.

7. Line of Credit

On January 4, 2016, we entered into a $250,000 revolving credit agreement (“Credit Agreement”) with JP Morgan Chase Bank, N.A., as administrative agent, U.S. Bank National Association, as syndication agent, and certain other lenders. The Credit Agreement is secured by substantially all of our existing and future property and material domestic subsidiaries. The Credit Agreement provides a subfacility of up to $10,000 for letters of credit and a subfacility of up to $10,000 for swing-line loans. The Credit Agreement matures on January 4, 2021 and the full balance of the revolving loans and all other obligations under the agreement must be paid at that time. The revolving loans under the Credit Agreement will be available for letters of credit, working capital and general corporate purposes. We were in compliance with all covenants under the Credit Agreement as of December 31, 2017.

As of December 31, 2017, we had $39,000 in outstanding loans and $211,000 of unused credit under the Credit Agreement. As of March 31, 2017, we had $15,000 in outstanding loans under the Credit Agreement.

Interest expense related to the Credit Agreement was $463 and $359 for the three months ended December 31, 2017 and 2016, respectively. Amortization of deferred debt issuance costs was $269 for both the three months ended December 31, 2017 and 2016.

Interest expense related to the Credit Agreement was $1,390 and $1,631 for the nine months ended December 31, 2017 and 2016, respectively. Amortization of deferred debt issuance costs was $807 for both the nine months ended December 31, 2017 and 2016, respectively.