Pension Plans (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2010
Pension Plans [Abstract]
Number of noncontributory defined benefit pension plans	3
Change in plan assets: [Abstract]
Fair value of plan assets at end of year	$ 39,425		$ 22,502
Funded status at end of year: [Abstract]
Fair value of plan assets	39,425		22,502
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Pension Contributions	2,482		1,080
Change in benefit obligations: [Abstract]
Benefit obligations at beginning of year	30,218		28,367
Acquisition of business	23,827		0
Interest cost	1,553		1,439		1,285
Service cost	102		114		26
Amendments	465		0
Actuarial loss	6,860		1,698
Benefits paid	(1,430)		(1,400)
Benefit obligations at end of year	61,595		30,218		28,367
Change in plan assets: [Abstract]
Fair value of plan assets at beginning of year	22,502		19,249
Acquisition of business	14,328		0
Actual gain on plan assets	1,543		3,573
Employer contributions	2,482		1,080
Benefits paid	(1,430)		(1,400)
Fair value of plan assets at end of year	39,425		22,502		19,249
Funded status at end of year: [Abstract]
Fair value of plan assets	39,425		22,502		19,249
Benefit obligations	61,595		30,218		28,367
Funded status	(22,170)		(7,716)
Amounts recognized in the consolidated balance sheet consist of: [Abstract]
Noncurrent liability	(22,170)		(7,716)
Current liability	0		0
Accumulated other comprehensive loss	13,008		6,356
Net actuarial loss recognized in other comprehensive income (loss)	(6,652)		1,066		(1,402)
Accumulated benefit obligation for defined benefit pension plans	61,595		30,218
Net periodic pension expense [Abstract]
Interest cost	1,553		1,439		1,285
Service cost	102		114		26
Expected return on plan assets	(1,737)		(1,487)		(1,075)
Amortization of net loss	866		678		572
Net periodic pension expense	784		744		808
Net actuarial losses to be recognized into periodic benefit cost	1,774
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)			5.25%
Employer contributions [Abstract]
Estimated future employer contributions for the current fiscal year	4,128
Expected future benefit payments [Abstract]
2013	2,555
2014	2,788
2015	2,981
2016	3,193
2017	3,305
Years 2018 - 2022	17,398
Pension Plans, Defined Benefit [Member] | Maximum [Member]
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)	5.00%		5.30%
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)	5.30%				6.25%
Expected return on plan assets (in hundredths)	8.00%		8.50%		8.50%
Pension Plans, Defined Benefit [Member] | Minimum [Member]
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)	3.50%		5.25%
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)	5.00%				5.85%
Expected return on plan assets (in hundredths)	5.50%		8.00%		8.00%
Nonpension Postretirement Plan [Member]
Change in benefit obligations: [Abstract]
Benefit obligations at beginning of year	0		0
Acquisition of business	11,906		0
Interest cost	0		0		0
Service cost	0		0		0
Amendments	0		0
Actuarial loss	0		0
Benefits paid	0		0
Benefit obligations at end of year	11,906		0		0
Change in plan assets: [Abstract]
Fair value of plan assets at beginning of year	0		0
Acquisition of business	0		0
Actual gain on plan assets	0		0
Employer contributions	0		0
Benefits paid	0		0
Fair value of plan assets at end of year	0		0		0
Funded status at end of year: [Abstract]
Fair value of plan assets	0		0		0
Benefit obligations	11,906		0		0
Funded status	(11,906)		0
Amounts recognized in the consolidated balance sheet consist of: [Abstract]
Noncurrent liability	11,802		0
Current liability	104		0
Accumulated other comprehensive loss	0		0
Accumulated benefit obligation for defined benefit pension plans	11,906		0
Net periodic pension expense [Abstract]
Interest cost	0		0		0
Service cost	0		0		0
Expected return on plan assets	0		0		0
Amortization of net loss	0		0		0
Net periodic pension expense	0		0		0
Assumptions used to determine benefit obligations [Abstract]
Discount rate, benefit obligation (in hundredths)	5.10%			[1]
Assumptions used to determine net periodic expense [Abstract]
Discount rate, net periodic expense (in hundredths)		[1]		[1]		[1]
Expected return on plan assets (in hundredths)		[1]		[1]		[1]
Employer contributions [Abstract]
Estimated future employer contributions for the current fiscal year	104
Expected future benefit payments [Abstract]
2013	104
2014	153
2015	209
2016	259
2017	303
Years 2018 - 2022	$ 2,066
Equity Securities [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	55.00%
Benefit plan asset allocation, maximum (in hundredths)	70.00%
Fixed Income Securities [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	30.00%
Benefit plan asset allocation, maximum (in hundredths)	40.00%
Real Estate [Member]
Benefit plan asset allocation [Abstract]
Benefit plan asset allocation, minimum (in hundredths)	5.00%
Benefit plan asset allocation, maximum (in hundredths)	10.00%

[1] NA