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Subsequent Events (Details) (USD $)
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0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | 0 Months Ended | 6 Months Ended | |||||||
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Feb. 10, 2012
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Feb. 29, 2012
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Feb. 28, 2011
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Mar. 28, 2012
Turotest Medidores Ltda [Member]
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Apr. 02, 2012
5.625% Senior Notes [Member]
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Feb. 29, 2012
2% Convertible Notes [Member]
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Mar. 27, 2012
2% Convertible Notes [Member]
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Nov. 30, 2003
2% Convertible Notes [Member]
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Jun. 12, 2007
6.875% Senior Notes [Member]
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Feb. 29, 2012
6.875% Senior Notes [Member]
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Aug. 31, 2011
6.875% Senior Notes [Member]
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Feb. 29, 2012
Class A Common Stock [Member]
2% Convertible Notes [Member]
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Feb. 29, 2012
Aggregate Amount [Member]
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| Debt Instrument [Line Items] | |||||||||||||
| Cash paid for business acquisitions, net of cash acquired | $ 18,907,000 | $ 158,533,000 | $ 8,100,000 | ||||||||||
| Deferred purchase price | 2,200,000 | 5,500,000 | |||||||||||
| Debt instrument, interest rate | 2.00% | 2.00% | 5.625% | 2.00% | 2.00% | 2.00% | 6.875% | 6.875% | |||||
| Redemption price as a percentage of principal amount | 100.00% | ||||||||||||
| Debt instrument conversion rate | 50.6554 | ||||||||||||
| Debt conversion principal amount | 1,000 | 1,000 | |||||||||||
| Debt conversion, converted instrument, shares issued | 5,956,619 | ||||||||||||
| Senior Notes | 300,000,000 | 250,000,000 | 249,481,000 | 249,432,000 | |||||||||
| Debt instrument, maturity date | Nov. 15, 2023 | Jun. 15, 2017 | |||||||||||
| Senior notes issuance price percentage | 100.00% | 99.607% | |||||||||||
| Total consideration paid for Senior Notes | $ 1,042.16 | $ 260,500,000 | |||||||||||
| X | ||||||||||
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- Definition
Business acquisition, deferred purchase price. No definition available.
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| X | ||||||||||
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- Definition
Debt conversion principal amount. No definition available.
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| X | ||||||||||
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- Definition
Redemption price as a percentage of principal amount. No definition available.
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| X | ||||||||||
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- Definition
Senior notes issuance price percentage. No definition available.
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| X | ||||||||||
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- Definition
The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The ratio applied to the debt for purposes of determining the number of shares of the equity security into which the debt will be converted. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Interest rate stated in the contractual debt agreement. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Date when the debt instrument is scheduled to be fully repaid, which may be presented in a variety of ways (year, month and year, day, month and year, quarter, etc.). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The cash outflow associated with the acquisition of a business, net of the cash acquired from the purchase. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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