Pension and Postretirement Benefit Plans (Details) (USD $)	12 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009
401(k) Savings and Investment Plan [Abstract]
Maximum percentage of eligible compensation allowed for employee contributions	50.00%
Employer matching percentage of the first 3% of employee contributions	100.00%
Maximum percentage of employee eligible compensation with 100% matching contributions by employer	3.00%
Employer matching percentage of the next 2% of employee contributions	50.00%
Maximum percentage of employee eligible compensation with 50% matching contributions by employer	2.00%
Company contribution expense	$ 8,100,000	$ 13,500,000	$ 8,100,000
Special one-time contribution authorized by Board of Directors		5,400,000
Amounts recognized in Accumulated Other Comprehensive Loss [Abstract]
Unrecognized net actuarial losses, net of taxes			16,674,000
Unrecognized prior service credit (costs), net of taxes			(916,000)
Total			15,758,000
Amounts to be Recognized as Net Periodic Benefit Costs in Fiscal 2012 [Abstract]
Net actuarial losses	1,600,000
Pension [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	116,949,000	104,009,000
Service cost	9,647,000	8,568,000	8,632,000
Interest cost	5,297,000	5,777,000	5,721,000
Participant contributions	0	0
Plan amendments	472,000	0
Actuarial loss	1,976,000	6,543,000
Benefits paid (including lump sums)	(8,652,000)	(7,948,000)
Benefit Obligation, end of year	125,689,000	116,949,000	104,009,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	113,576,000	95,401,000
Actual return on plan assets	25,553,000	15,475,000
Employer contributions	526,000	10,648,000
Participant contributions	0	0
Benefits paid (including lump sums)	(8,652,000)	(7,948,000)
Fair value of plan assets, end of year	131,003,000	113,576,000	95,401,000
Over (under) funded status, end of year	5,314,000	(3,373,000)
Amounts Recognized in Balance Sheet [Abstract]
Other assets, Prepaid benefit cost	23,128,000	12,515,000
Accrued expenses-compensation and benefits, Accrued benefit liability	(892,000)	(1,026,000)
Other noncurrent liabilities, Accrued benefit liability	(16,922,000)	(14,862,000)
Net amount recognized, end of year	5,314,000	(3,373,000)
Accumulated benefit obligation	112,700,000	104,100,000
Projected and Accumulated Benefit Obligations in Excess of Plan Assets [Abstract]
Projected benefit obligation	17,924,000	15,961,000
Accumulated benefit obligation	14,036,000	12,605,000
Fair value of plan assets	110,000	74,000
Components of Net Periodic Benefit Costs [Abstract]
Service cost	9,647,000	8,568,000	8,632,000
Interest cost	5,297,000	5,777,000	5,721,000
Expected return on plan assets	(8,688,000)	(8,152,000)	(9,324,000)
Prior service cost amortization	373,000	853,000	839,000
Actuarial loss amortization	4,665,000	4,926,000	533,000
Settlement charge	0	(94,000)	93,000
Net periodic benefit costs	11,294,000	11,878,000	6,494,000
Amounts recognized in Accumulated Other Comprehensive Loss [Abstract]
Unrecognized net actuarial losses, net of taxes	16,235,000
Unrecognized prior service credit (costs), net of taxes	845,000
Total	17,080,000
Amounts to be Recognized as Net Periodic Benefit Costs in Fiscal 2012 [Abstract]
Prior service costs (credit)	400,000
Estimated Future Benefit Payments [Abstract]
2012	12,625,000
2013	19,101,000
2014	14,479,000
2015	13,615,000
2016	13,160,000
2017-2021	76,095,000
Pension [Member] | Investments in Registered Investment Companies [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	130,254,000
Pension [Member] | Investments in Registered Investment Companies [Member] | Quoted Prices (Level 1) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	73,296,000
Pension [Member] | Investments in Registered Investment Companies [Member] | Significant Other Observable Inputs (Level 2) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	56,958,000
Pension [Member] | Investments in Registered Investment Companies [Member] | Significant Unobservable Inputs (Level 3) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	0
Pension [Member] | Pooled Seperate Accounts [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	749,000
Pension [Member] | Pooled Seperate Accounts [Member] | Quoted Prices (Level 1) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	0
Pension [Member] | Pooled Seperate Accounts [Member] | Significant Other Observable Inputs (Level 2) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	749,000
Pension [Member] | Pooled Seperate Accounts [Member] | Significant Unobservable Inputs (Level 3) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	0
Pension [Member] | Quoted Prices (Level 1) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	73,296,000
Pension [Member] | Significant Other Observable Inputs (Level 2) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	57,707,000
Pension [Member] | Significant Unobservable Inputs (Level 3) [Member]
Change in Plan Assets [Roll Forward]
Fair value of plan assets, end of year	0
Postretirement [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	15,934,000	14,819,000
Service cost	476,000	422,000	461,000
Interest cost	792,000	907,000	980,000
Participant contributions	844,000	839,000
Plan amendments	0	0
Actuarial loss	(858,000)	1,325,000
Benefits paid (including lump sums)	(1,917,000)	(2,378,000)
Benefit Obligation, end of year	15,271,000	15,934,000	14,819,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	0	0
Actual return on plan assets	0	0
Employer contributions	1,073,000	1,539,000
Participant contributions	844,000	839,000
Benefits paid (including lump sums)	(1,917,000)	(2,378,000)
Fair value of plan assets, end of year	0	0	0
Over (under) funded status, end of year	(15,271,000)	(15,934,000)
Amounts Recognized in Balance Sheet [Abstract]
Other assets, Prepaid benefit cost	0	0
Accrued expenses-compensation and benefits, Accrued benefit liability	(1,060,000)	(1,160,000)
Other noncurrent liabilities, Accrued benefit liability	(14,211,000)	(14,774,000)
Net amount recognized, end of year	(15,271,000)	(15,934,000)
Components of Net Periodic Benefit Costs [Abstract]
Service cost	476,000	422,000	461,000
Interest cost	792,000	907,000	980,000
Expected return on plan assets	0	0	0
Prior service cost amortization	(734,000)	(736,000)	(736,000)
Actuarial loss amortization	0	0	0
Settlement charge	0	0	0
Net periodic benefit costs	534,000	593,000	705,000
Amounts recognized in Accumulated Other Comprehensive Loss [Abstract]
Unrecognized net actuarial losses, net of taxes		439,000
Unrecognized prior service credit (costs), net of taxes		(1,761,000)
Total		(1,322,000)
Amounts to be Recognized as Net Periodic Benefit Costs in Fiscal 2012 [Abstract]
Prior service costs (credit)	(500,000)
Estimated Future Benefit Payments [Abstract]
2012	1,060,000
2013	1,069,000
2014	1,102,000
2015	1,062,000
2016	1,130,000
2017-2021	$ 6,203,000