Debt (Notes)	9 Months Ended
Mar. 31, 2018
Debt Disclosure [Abstract]
Debt Disclosure [Text Block]	DEBT Revolving Credit Facility & Term Loan In January 2018, in conjunction with the acquisition of FCX, the Company refinanced its existing credit facility and entered into a new five-year credit facility with a group of banks expiring in January 2023. This agreement provides for a $780,000 unsecured term loan and a $250,000 unsecured revolving credit facility. Fees on this facility range from 0.10% to 0.20% per year based upon the Company's leverage ratio at each quarter end. Borrowings under this agreement carry variable interest rates tied to either LIBOR or prime at the Company's discretion. At March 31, 2018, the Company had $780,000 outstanding under the term loan and $87,500 outstanding under the revolver. Unused lines under this facility, net of outstanding letters of credit of $3,637 to secure certain insurance obligations, totaled $158,863 at March 31, 2018, and were available to fund future acquisitions or other capital and operating requirements. The interest rate on the term loan as of March 31, 2018 was 3.69%. The weighted average interest rate on the amount outstanding under the revolving credit facility as of March 31, 2018 was 3.49%. The new credit facility replaced the Company's previous credit facility agreement. At June 30, 2017, the Company had $120,313 outstanding under the term loan in the previous credit facility agreement, which carried a variable interest rate tied to LIBOR and was 2.25% as of June 30, 2017. No amount was outstanding under the revolver as of June 30, 2017. Unused lines under this facility, net of outstanding letters of credit of $2,441 to secure certain insurance obligations, totaled $247,559 at June 30, 2017. Additionally, the Company had letters of credit outstanding with a separate bank, not associated with either revolving credit agreement, in the amount of $2,698 as of March 31, 2018 and June 30, 2017, in order to secure certain insurance obligations. Other Long-Term Borrowings At March 31, 2018 and June 30, 2017, the Company had borrowings outstanding under its unsecured shelf facility agreement with Prudential Investment Management of $170,000. Fees on this facility range from 0.25% to 1.25% per year based upon the Company's leverage ratio at each quarter end. 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, 2018, $50,000 in additional financing was available under this facility. In 2014, the Company assumed $2,359 of debt as a part of the 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, 2018 and June 30, 2017, $1,496 and $1,669 was outstanding, respectively. Unamortized debt issue costs of $551 and $105 are included as a reduction of current portion of long-term debt on the condensed consolidated balance sheets as of March 31, 2018 and June 30, 2017, respectively. Unamortized debt issue costs of $1,936 and $294 are included as a reduction of long-term debt on the condensed consolidated balance sheets as of March 31, 2018 and June 30, 2017, respectively. The new credit facility and unsecured shelf facility contain restrictive covenants regarding liquidity, net worth, financial ratios, and other covenants. At March 31, 2018, the most restrictive of these covenants required that the Company have net indebtedness less than 4.25 times consolidated income before interest, taxes, depreciation and amortization. At March 31, 2018, the Company's indebtedness was less than 3.5 times consolidated income before interest, taxes, depreciation and amortization. The Company was in compliance with all covenants at March 31, 2018.

DEBT

Revolving Credit Facility & Term Loan

In January 2018, in conjunction with the acquisition of FCX, the Company refinanced its existing credit facility and entered into a new five-year credit facility with a group of banks expiring in January 2023. This agreement provides for a $780,000 unsecured term loan and a $250,000 unsecured revolving credit facility. Fees on this facility range from 0.10% to 0.20% per year based upon the Company's leverage ratio at each quarter end. Borrowings under this agreement carry variable interest rates tied to either LIBOR or prime at the Company's discretion. At March 31, 2018, the Company had $780,000 outstanding under the term loan and $87,500 outstanding under the revolver. Unused lines under this facility, net of outstanding letters of credit of $3,637 to secure certain insurance obligations, totaled $158,863 at March 31, 2018, and were available to fund future acquisitions or other capital and operating requirements. The interest rate on the term loan as of March 31, 2018 was 3.69%. The weighted average interest rate on the amount outstanding under the revolving credit facility as of March 31, 2018 was 3.49%.

The new credit facility replaced the Company's previous credit facility agreement. At June 30, 2017, the Company had $120,313 outstanding under the term loan in the previous credit facility agreement, which carried a variable interest rate tied to LIBOR and was 2.25% as of June 30, 2017. No amount was outstanding under the revolver as of June 30, 2017. Unused lines under this facility, net of outstanding letters of credit of $2,441 to secure certain insurance obligations, totaled $247,559 at June 30, 2017.

Additionally, the Company had letters of credit outstanding with a separate bank, not associated with either revolving credit agreement, in the amount of $2,698 as of March 31, 2018 and June 30, 2017, in order to secure certain insurance obligations.

Other Long-Term Borrowings

At March 31, 2018 and June 30, 2017, the Company had borrowings outstanding under its unsecured shelf facility agreement with Prudential Investment Management of $170,000. Fees on this facility range from 0.25% to 1.25% per year based upon the Company's leverage ratio at each quarter end. 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, 2018, $50,000 in additional financing was available under this facility.

In 2014, the Company assumed $2,359 of debt as a part of the 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, 2018 and June 30, 2017, $1,496 and $1,669 was outstanding, respectively.

Unamortized debt issue costs of $551 and $105 are included as a reduction of current portion of long-term debt on the condensed consolidated balance sheets as of March 31, 2018 and June 30, 2017, respectively. Unamortized debt issue costs of $1,936 and $294 are included as a reduction of long-term debt on the condensed consolidated balance sheets as of March 31, 2018 and June 30, 2017, respectively.

The new credit facility and unsecured shelf facility contain restrictive covenants regarding liquidity, net worth, financial ratios, and other covenants. At March 31, 2018, the most restrictive of these covenants required that the Company have net indebtedness less than 4.25 times consolidated income before interest, taxes, depreciation and amortization. At March 31, 2018, the Company's indebtedness was less than 3.5 times consolidated income before interest, taxes, depreciation and amortization. The Company was in compliance with all covenants at March 31, 2018.