Line of Credit (Notes)	12 Months Ended
Mar. 31, 2017
Debt Disclosure [Abstract]
LIne of Credit	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 financial and non-financial covenants under the Credit Agreement as of March 31, 2017. The revolving loans under the Credit Agreement bear interest at our option of either, (a) a base rate based on the highest of (i) the rate of interest per annum publicly announced from time to time by JPMorgan Chase Bank, N.A., as its prime rate, (ii) the greater of (A) the federal funds effective rate and (B) the overnight bank funding rate (as determined by the Federal Reserve Bank of New York) plus 0.50% and (iii) the one-month British Bankers Association London Interbank Offered Rate ("LIBOR") plus 1.00%) plus an applicable margin based on our leverage ratio from time to time, ranging from 0.50% to 1.50%, or (b) a LIBOR-based rate (subject to a floor of 0.00%) plus an applicable margin based on our leverage ratio from time to time, ranging from 1.50% to 2.50%. We will also pay a commitment fee of between 0.25% and 0.45%, payable quarterly in arrears, on the average daily unused amount of the revolving facility based on our leverage ratio from time to time. The revolving loans are subject to customary representations, warranties and ongoing affirmative and negative covenants and agreements. The negative covenants include, among other things, limitations on indebtedness, liens, asset sales, mergers and acquisitions, investments, transactions with affiliates, dividends and other restricted payments, subordinated indebtedness and amendments to subordinated indebtedness documents and sale and leaseback transactions. The Credit Agreement also requires us to maintain (1) a maximum leverage ratio of (a) 3.00 to 1.00 for any such fiscal quarter ending on or prior to September 30, 2016, (b) 2.75 to 1.00 for any such fiscal quarter ending after September 30, 2016 and on or prior to September 30, 2017 and (c) 2.50 to 1.00 for any such fiscal quarter ending after September 30, 2017; and (2) a minimum fixed charge coverage ratio of 3.00 to 1.00 at the end of each fiscal quarter through the term of the loan. As of March 31, 2017, we had $15,000 in outstanding loans and $235,000 of unused credit under the Credit Agreement. As of March 31, 2016, we had $105,000 in outstanding loans and $145,000 of unused credit under the Credit Agreement.The interest rates as of March 31, 2017 and 2016 was approximately 2.3% and 2.4%, respectively. During the years ended March 31, 2017 and 2016 we recorded $1,899 and $969 of interest expense, respectively, and the weighted average interest rates were approximately 2.4% and 3.2%, respectively. Debt issuance costs and other related fees paid to legal advisors and third parties in connection with securing the Credit Agreement totaled $5,382. The deferred debt issuance costs are reported as a component of other assets on the consolidated balance sheet and are being amortized to interest expense over the term of the Credit Agreement. During the years ended March 31, 2017 and 2016 we recorded $1,076 and 258, respectively, in amortization of deferred debt issuance costs related to the Credit Agreement.

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 financial and non-financial covenants under the Credit Agreement as of March 31, 2017.

The revolving loans under the Credit Agreement bear interest at our option of either, (a) a base rate based on the highest of (i) the rate of interest per annum publicly announced from time to time by JPMorgan Chase Bank, N.A., as its prime rate, (ii) the greater of (A) the federal funds effective rate and (B) the overnight bank funding rate (as determined by the Federal Reserve Bank of New York) plus 0.50% and (iii) the one-month British Bankers Association London Interbank Offered Rate ("LIBOR") plus 1.00%) plus an applicable margin based on our leverage ratio from time to time, ranging from 0.50% to 1.50%, or (b) a LIBOR-based rate (subject to a floor of 0.00%) plus an applicable margin based on our leverage ratio from time to time, ranging from 1.50% to 2.50%. We will also pay a commitment fee of between 0.25% and 0.45%, payable quarterly in arrears, on the average daily unused amount of the revolving facility based on our leverage ratio from time to time.

The revolving loans are subject to customary representations, warranties and ongoing affirmative and negative covenants and agreements. The negative covenants include, among other things, limitations on indebtedness, liens, asset sales, mergers and acquisitions, investments, transactions with affiliates, dividends and other restricted payments, subordinated indebtedness and amendments to subordinated indebtedness documents and sale and leaseback transactions. The Credit Agreement also requires us to maintain (1) a maximum leverage ratio of (a) 3.00 to 1.00 for any such fiscal quarter ending on or prior to September 30, 2016, (b) 2.75 to 1.00 for any such fiscal quarter ending after September 30, 2016 and on or prior to September 30, 2017 and (c) 2.50 to 1.00 for any such fiscal quarter ending after September 30, 2017; and (2) a minimum fixed charge coverage ratio of 3.00 to 1.00 at the end of each fiscal quarter through the term of the loan.

As of March 31, 2017, we had $15,000 in outstanding loans and $235,000 of unused credit under the Credit Agreement. As of March 31, 2016, we had $105,000 in outstanding loans and $145,000 of unused credit under the Credit Agreement.The interest rates as of March 31, 2017 and 2016 was approximately 2.3% and 2.4%, respectively.

During the years ended March 31, 2017 and 2016 we recorded $1,899 and $969 of interest expense, respectively, and the weighted average interest rates were approximately 2.4% and 3.2%, respectively.

Debt issuance costs and other related fees paid to legal advisors and third parties in connection with securing the Credit Agreement totaled $5,382. The deferred debt issuance costs are reported as a component of other assets on the consolidated balance sheet and are being amortized to interest expense over the term of the Credit Agreement. During the years ended March 31, 2017 and 2016 we recorded $1,076 and 258, respectively, in amortization of deferred debt issuance costs related to the Credit Agreement.