Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2010
Income (Loss) before provision for income taxes and (income) loss attributable to noncontrolling interest [Abstract]
U.S. operations		$ 73,859	$ 87,096	$ 21,865
Non-U.S. operations		12,777	5,618	32,942
Income before provision for income taxes		86,636	92,714	54,807
Current [Abstract]
Federal		13,506	16,113	10,471
State		1,996	1,982	2,686
Foreign		3,946	4,355	14,446
Total current		19,448	22,450	27,603
Deferred [Abstract]
Federal		8,257	12,622	(3,745)
State		1,244	1,107	(3,315)
Foreign		(189)	(191)	(4)
Total deferred		9,312	13,538	(8,123)
Total provision for income taxes		28,760	35,988	20,539
Effective income tax rate reconciliation [Abstract]
Federal statutory rate (in hundredths)		35.00%	35.00%	35.00%
State taxes, net of federal benefit (in hundredths)		2.40%	2.60%	(3.60%)
Foreign tax holiday and rate differential (in hundredths)		(1.80%)	0.70%	2.30%
Change in valuation allowance (in hundredths)		1.10%	(0.20%)	5.50%
Domestic production activities deduction (in hundredths)		(1.90%)	(1.70%)	(1.20%)
Other items (in hundredths)		(1.60%)	2.40%	(0.50%)
Effective tax rate (in hundredths)		33.20%	38.80%	37.50%
Tax credits	1,855
Deferred tax assets [Abstract]
Inventories	3,676	3,676	2,414
Accounts receivable	198	198	139
Accruals	9,322	9,322	6,673
Deferred Revenue	178	178	298
Net operating losses and other carryforwards	16,223	16,223	17,999
Other assets	901	901	259
Share-based compensation	5,104	5,104	4,868
Gross deferred tax assets	35,602	35,602	32,650
Valuation allowance	(10,340)	(10,340)	(8,754)
Net deferred tax assets	25,262	25,262	23,896
Deferred tax liabilities [Abstract]
Fixed assets	(46,257)	(46,257)	(39,340)
Prepaid expenses	(1,861)	(1,861)	(899)
Intangibles	(1,147)	(1,147)	(974)
Total deferred tax liabilities	(49,265)	(49,265)	(41,213)
Net deferred tax liabilities	(24,003)	(24,003)	(17,317)
Valuation Allowance [Line Items]
Valuation allowance amount	10,340	10,340	8,754	13,497
Valuation allowance, change in amount		1,586	(4,743)
Reconciliation of unrecognized tax benefits, excluding interest and penalties [Roll Forward]
Balance at the beginning of the year		774	2,039	0
Gross increases for prior year tax positions		0	206	2,039
Gross decreases for prior year tax positions		(252)	(1,471)	0
Balance at the end of the year	522	522	774	2,039
Interest and penalties included in uncertain tax positions liability		76	145	336
Change in unrecognized tax benefits is reasonably possible, amount	146	146
Interest and penalties recognized in income tax benefit/provison		42	(149)	268
Uncertain tax positions that would impact effective tax rate	522	522	774	629
Federal NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	4,100	4,100	4,100	3,848
State NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	857	857	819	1,055
Foreign NOLs [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	2,787	2,787	1,229	5,781
Federal Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	236	236	235	463
State Credits [Member]
Valuation Allowance [Line Items]
Valuation allowance amount	2,360	2,360	2,371	2,350
Federal [Member]
Net operating loss carryforwards and expiration dates [Line Items]
Net operating loss carryforwards	23,204	23,204
Net operating loss carryforwards, expiration dates		2024 through 2026
State [Member]
Net operating loss carryforwards and expiration dates [Line Items]
Net operating loss carryforwards	105,123	105,123
Net operating loss carryforwards, expiration dates		2012 through 2031
Foreign [Member]
Net operating loss carryforwards and expiration dates [Line Items]
Net operating loss carryforwards	$ 9,074	$ 9,074
Net operating loss carryforwards, expiration dates		2012 through 2021