Benefit Plans (Tables)

12 Months Ended

Jun. 30, 2018

Retirement Benefits, Description [Abstract]

Summary of changes in benefit obligations, plan assets and funded status for the post employment plans

The following table sets forth the changes in benefit obligations and plan assets during the year and the funded status for the post-employment plans at June 30:

	Pension Benefits						Retiree Health Care Benefits
	2018			2017			2018			2017
Change in benefit obligation:
Benefit obligation at beginning of the year	$	24,411		$	26,605		$	1,684		$	2,235
Service cost	124			126			19			29
Interest cost	729			687			52			63
Plan participants’ contributions	—			—			68			69
Benefits paid	(3,181		)	(1,562		)	(223		)	(237		)
Amendments	—			—			—			(245		)
Actuarial gain during year	(549		)	(1,445		)	(109		)	(230		)
Benefit obligation at end of year	$	21,534		$	24,411		$	1,491		$	1,684
Change in plan assets:
Fair value of plan assets at beginning of year	$	6,530		$	6,737		$	—		$	—
Actual gain on plan assets	516			578			—			—
Employer contributions	3,837			776			155			168
Plan participants’ contributions	—			—			68			69
Benefits paid	(3,181		)	(1,561		)	(223		)	(237		)
Fair value of plan assets at end of year	$	7,702		$	6,530		$	—		$	—
Funded status at end of year	$	(13,832	)	$	(17,881	)	$	(1,491	)	$	(1,684	)

Amounts Recognized in Consolidated Balance Sheet [Table Text Block]

The amounts recognized in the consolidated balance sheets and in accumulated other comprehensive loss for the post-employment plans were as follows:

	Pension Benefits						Retiree Health Care Benefits
June 30,	2018			2017			2018		2017
Amounts recognized in the consolidated balance sheets:
Other current liabilities	$	3,298		$	2,814		$	220	$	220
Post-employment benefits	10,534			15,067			1,271		1,464
Net amount recognized	$	13,832		$	17,881		$	1,491	$	1,684
Amounts recognized in accumulated other comprehensive loss:
Net actuarial (loss) gain	$	(4,781	)	$	(5,798	)	$	1,121	$	1,167
Prior service cost	—			(35		)	554		922
Total amounts recognized in accumulated other comprehensive loss	$	(4,781	)	$	(5,833	)	$	1,675	$	2,089

Information for pension plans with projected benefit obligations in excess of plan assets

The following table provides information for pension plans with projected benefit obligations and accumulated benefit obligations in excess of plan assets:

	Pension Benefits
June 30,	2018		2017
Projected benefit obligations	$	21,534	$	24,411
Accumulated benefit obligations	21,534		24,411
Fair value of plan assets	7,702		6,530

Net periodic costs

The net periodic costs (benefits) are as follows:

	Pension Benefits									Retiree Health Care Benefits
Year Ended June 30,	2018			2017			2016			2018			2017			2016
Service cost	$	124		$	126		$	91		$	19		$	29		$	22
Interest cost	729			687			879			52			63			75
Expected return on plan assets	(472		)	(460		)	(491		)	—			—			—
Recognized net actuarial loss (gain)	424			872			913			(154		)	(181		)	(210		)
Amortization of prior service cost	27			86			86			(369		)	(271		)	(271		)
Recognition of prior service cost upon plan curtailment	8			—			—			—			—			—
Net periodic cost (benefits)	$	840		$	1,311		$	1,478		$	(452	)	$	(360	)	$	(384	)

Weighted-average actuarial assumptions used to determine benefit obligations and net periodic benefit cost

The weighted-average actuarial assumptions used to determine benefit obligations and net periodic benefit cost for the plans were as follows:

	Pension Benefits				Retiree Health Care Benefits
June 30,	2018		2017		2018		2017
Assumptions used to determine benefit obligations at year end:
Discount rate	3.5	%	2.8	%	3.8	%	3.3	%
Assumptions used to determine net periodic benefit cost:
Discount rate	2.8	%	2.3	%	3.3	%	2.9	%
Expected return on plan assets	7.0	%	7.0	%	N/A		N/A

One-Percentage Point Change in Assumed Health Care Cost Trend Rates

A one-percentage point change in the assumed health care cost trend rates would have had the following effects as of June 30, 2018 and for the year then ended:

	One-Percentage Point
	Increase		Decrease
Effect on total service and interest cost components of periodic expense	$	9	$	(8	)
Effect on post-retirement benefit obligation	152		(130		)

Defined Benefit Plan Asset Information

Following are the fair values and target allocation as of June 30:

	Target Allocation	Fair Value
		2018		2017
Asset Class:
Equity* securities (Level 1)	40 – 70%	$	6,226	$	3,880
Debt securities (Level 2)	20 – 50%	1,337		2,538
Other (Level 1)	0 – 20%	139		112
Total	100%	$	7,702	$	6,530

Estimated future benefit payments

The following benefit payments, which reflect expected future service, as applicable, are expected to be paid in each of the next five years and in the aggregate for the subsequent five years:

During Fiscal Years	Pension Benefits		Retiree Health  Care Benefits
2019	$	3,700	$	130
2020	3,800		120
2021	1,300		110
2022	1,300		110
2023	1,400		100
2024 through 2028	5,200		530