Investments	3 Months Ended
Aug. 31, 2016
Investments, Debt and Equity Securities [Abstract]
Investments	Investments Investments at August 31, 2016 of $140.9 million include the cash surrender value of insurance policies of $121.2 million, equity method investments of $14.7 million, and cost method investments of $5.0 million. Investments at May 31, 2016 of $125.0 million include the cash surrender value of insurance policies of $108.1 million, equity method investments of $14.5 million and cost method investments of $2.4 million. Investments are evaluated for impairment on an annual basis or when indicators of impairment exist. For the three months ended August 31, 2016 and 2015, no impairment losses were recorded.

Investments

3 Months Ended

Aug. 31, 2016

Investments, Debt and Equity Securities [Abstract]

Investments at August 31, 2016 of $140.9 million include the cash surrender value of insurance policies of $121.2 million, equity method investments of $14.7 million, and cost method investments of $5.0 million. Investments at May 31, 2016 of $125.0 million include the cash surrender value of insurance policies of $108.1 million, equity method investments of $14.5 million and cost method investments of $2.4 million.

Investments are evaluated for impairment on an annual basis or when indicators of impairment exist. For the three months ended August 31, 2016 and 2015, no impairment losses were recorded.