XML 51 R40.htm IDEA: XBRL DOCUMENT v3.3.1.900
Marketable Securities - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jan. 31, 2016
Jan. 31, 2015
Jan. 31, 2016
Jan. 31, 2015
Apr. 30, 2015
Schedule Of Marketable Securities [Line Items]          
Marketable securities classified as available-for-sale investments $ 0   $ 0   $ 13,177 [1]
Proceeds from maturities of available-for-sale securities 2,000 $ 1,000 13,100 $ 3,000  
Trading securities 135,938   135,938   131,399 [1],[2]
Gross unrealized gains 100   100   8,300
Gross unrealized losses $ 6,500   $ 6,500   $ 200
[1] The Company's financial assets measured at fair value on a recurring basis include trading securities classified as Level 1 and available-for-sale securities classified as Level 2. As of January 31, 2016 and April 30, 2015, the Company had no investments classified as Level 3.
[2] These investments are held in trust for settlement of the Company's vested and unvested obligations of $133.0 million and $129.1 million as of January 31, 2016 and April 30, 2015, respectively, under the ECAP (see Note 6 - Deferred Compensation and Retirement Plans). During the three and nine months ended January 31, 2016, the fair value of the investments decreased; therefore, the Company recognized a loss of $7.1 million and $8.9 million, respectively, which was recorded in other (loss) income, net. During the three months ended January 31, 2015, the fair value of investments decreased; therefore, the Company recognized a loss of $0.2 million, which was recorded in other (loss) income, net. For the nine months ended January 31, 2015, the fair value of the investments increased; therefore, the Company recognized income of $4.3 million, which was recorded in other (loss) income, net.