Debt (Notes)	9 Months Ended
Mar. 31, 2016
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	DEBT In December 2015, the Company entered into a new five-year credit facility with a group of banks expiring in December 2020. This agreement provides for a $125,000 unsecured term loan and a $250,000 unsecured revolving credit facility. Borrowings under this agreement carry variable interest rates tied to either LIBOR or prime at the Company's discretion. At March 31, 2016, the Company had $124,219 outstanding under the term loan and $75,000 outstanding under the revolver. Unused lines under this facility, net of outstanding letters of credit of $3,718 to secure certain insurance obligations, totaled $171,282 at March 31, 2016, and are available to fund future acquisitions or other capital and operating requirements. The interest rate on the term loan as of March 31, 2016 was 1.44%. The weighted average interest rate on the revolving credit facility outstanding as of March 31, 2016 was 1.37%. The new credit facility replaced the Company's previous term loan and revolving credit facility agreements. The Company had $96,875 outstanding at June 30, 2015 under the previous term loan agreement, which carried a variable interest rate tied to LIBOR and was 1.19% at June 30, 2015. At June 30, 2015, the Company had $52,000 outstanding under the previous revolving credit facility. Unused lines under this facility, net of outstanding letters of credit of $3,764 to secure certain insurance obligations, totaled $94,236 at June 30, 2015 and were available to fund future acquisitions or other capital and operating requirements. The weighted average interest rate on the revolving credit facility outstanding as of June 30, 2015 was 1.15%. Additionally, the Company had letters of credit outstanding with a separate bank, not associated with the revolving credit agreement, in the amount of $2,000 as of March 31, 2016 and $1,841 as of June 30, 2015, in order to secure certain insurance obligations. Other Long-Term Borrowings In April 2014, the Company assumed $2,359 of debt as a part of its headquarters facility acquisition. The 1.5% fixed interest rate note is held by the State of Ohio Development Services Agency, maturing in May 2024. At March 31, 2016 and June 30, 2015, $1,952 and $2,120 was outstanding, respectively. At March 31, 2016 and June 30, 2015, the Company had borrowings outstanding under its unsecured shelf facility agreement with Prudential Investment Management of $170,000. The "Series C" notes have a principal amount of $120,000 and carry a fixed interest rate of 3.19%, and are due in equal principal payments in July 2020, 2021 and 2022. The "Series D" notes have a principal amount of $50,000 and carry a fixed interest rate of 3.21%, and are due in equal principal payments in October 2019 and 2023. As of March 31, 2016, $50,000 in additional financing was available under this facility.

DEBT

In December 2015, the Company entered into a new five-year credit facility with a group of banks expiring in December 2020. This agreement provides for a $125,000 unsecured term loan and a $250,000 unsecured revolving credit facility. Borrowings under this agreement carry variable interest rates tied to either LIBOR or prime at the Company's discretion. At March 31, 2016, the Company had $124,219 outstanding under the term loan and $75,000 outstanding under the revolver. Unused lines under this facility, net of outstanding letters of credit of $3,718 to secure certain insurance obligations, totaled $171,282 at March 31, 2016, and are available to fund future acquisitions or other capital and operating requirements. The interest rate on the term loan as of March 31, 2016 was 1.44%. The weighted average interest rate on the revolving credit facility outstanding as of March 31, 2016 was 1.37%.

The new credit facility replaced the Company's previous term loan and revolving credit facility agreements. The Company had $96,875 outstanding at June 30, 2015 under the previous term loan agreement, which carried a variable interest rate tied to LIBOR and was 1.19% at June 30, 2015. At June 30, 2015, the Company had $52,000 outstanding under the previous revolving credit facility. Unused lines under this facility, net of outstanding letters of credit of $3,764 to secure certain insurance obligations, totaled $94,236 at June 30, 2015 and were available to fund future acquisitions or other capital and operating requirements. The weighted average interest rate on the revolving credit facility outstanding as of June 30, 2015 was 1.15%.

Additionally, the Company had letters of credit outstanding with a separate bank, not associated with the revolving credit agreement, in the amount of $2,000 as of March 31, 2016 and $1,841 as of June 30, 2015, in order to secure certain insurance obligations.

Other Long-Term Borrowings

In April 2014, the Company assumed $2,359 of debt as a part of its headquarters facility acquisition. The 1.5% fixed interest rate note is held by the State of Ohio Development Services Agency, maturing in May 2024. At March 31, 2016 and June 30, 2015, $1,952 and $2,120 was outstanding, respectively.

At March 31, 2016 and June 30, 2015, the Company had borrowings outstanding under its unsecured shelf facility agreement with Prudential Investment Management of $170,000. The "Series C" notes have a principal amount of $120,000 and carry a fixed interest rate of 3.19%, and are due in equal principal payments in July 2020, 2021 and 2022. The "Series D" notes have a principal amount of $50,000 and carry a fixed interest rate of 3.21%, and are due in equal principal payments in October 2019 and 2023. As of March 31, 2016, $50,000 in additional financing was available under this facility.