Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Debt - Additional Information (Detail)	Sep. 30, 2012 USD ($)	Jun. 30, 2012 USD ($)	Sep. 30, 2011	Sep. 30, 2012 Yen Revolving Credit Facility [Member] JPY (¥)	Jun. 30, 2012 Yen Revolving Credit Facility [Member]	Sep. 30, 2012 Yen Loan [Member] JPY (¥)	Sep. 30, 2012 Minimum [Member]	Sep. 30, 2012 Minimum [Member] Yen Revolving Credit Facility [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Maximum [Member] Yen Revolving Credit Facility [Member]
Debt Disclosure [Line Items]
Credit facility	$ 50,000,000			¥ 500,000,000
Line of credit facility, maximum borrowing capacity	80,000,000
Debt instrument, month of maturity	2016			2016
Debt instrument, basis spread on LIBOR				0.625%	0.625%		0.625%	0.625%	1.50%	1.50%
Amount borrowed						300,000,000
Available credit under lines of credit	37,200,000	42,300,000
Total outstanding letters of credit	$ 900,000	$ 900,000
Weighted average interest rate of total borrowings	0.89%		1.01%