Adjustment to additional paid in capital resulting from the recognition of convertible debt instruments as two separate components - a debt component and an equity component. This bifurcation may result in a basis difference associated with the liability component that represents a temporary difference for purposes of applying accounting for income taxes. The initial recognition of deferred taxes for the tax effect of that temporary difference is as an adjustment to additional paid in capital.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 25
-Paragraph 22
-URI http://asc.fasb.org/extlink&oid=51819886&loc=SL6014347-161799

Notes Payable, Net - Additional Information (Detail) $ / shares in Units, $ in Thousands, shares in Millions		1 Months Ended	12 Months Ended
	Apr. 01, 2018 USD ($) shares	Mar. 31, 2014 USD ($)	Aug. 31, 2018 USD ($) $ / shares	Aug. 31, 2017 USD ($)
Debt Instrument [Line Items]
Debt issuance costs			$ 1,824	$ 2,623
Periodic Principal Payment		$ 1,750
Balloon payment		$ 159,800
Swap agreement interest rate		50.00%
Fixed interest rate		3.74%
Debt instrument amount outstanding			469,721	597,604
LIBOR
Debt Instrument [Line Items]
Debt instrument, percentage points added to the reference rate		1.75%
Term Loan
Debt Instrument [Line Items]
Debt instrument amount outstanding			170,300
Senior term debt			200,000
Other Term Loan Due February 2018 to April 2020
Debt Instrument [Line Items]
Senior term debt			9,700
Other Notes Payable
Debt Instrument [Line Items]
Unsecured debt			$ 14,800
Senior Unsecured Notes
Debt Instrument [Line Items]
Debt instrument, maturity date			Jun. 30, 2019
2018 Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate			3.50%
Convertible senior notes	$ 119,100			119,063
Debt instrument, maturity date			Apr. 01, 2018
Convertible notes conversion rate, per share \| $ / shares			$ 35.47
Conversion of 2018 Convertible Senior Notes, shares \| shares	3.4
2024 Convertible Senior Notes
Debt Instrument [Line Items]
Debt instrument, interest rate			2.875%
Convertible senior notes			$ 275,000	275,000
Debt instrument, maturity date			Feb. 01, 2024
Convertible notes conversion rate, per share \| $ / shares			$ 60.16
Description of long term debt			Convertible senior notes, due 2024, bear interest at a fixed rate of 2.875%, paid semi-annually in arrears on February 1st and August 1st.
Convertible notes initial conversion rate, shares per $1,000 principal amount			16.6234
Initial debt discount			$ 33,100
Debt issuance costs			$ 8,000
Frequency of payments			Semi-annually
2024 Convertible Senior Notes \| ASC 470-20
Debt Instrument [Line Items]
Convertible notes, fair value			$ 241,900
Proceeds from the issuance of the notes			275,000
Convertible notes, equity component			33,100	33,100
2024 Convertible Senior Notes \| ASC 470-20 \| Additional Paid-in Capital
Debt Instrument [Line Items]
Convertible senior notes - equity component, net of tax			$ 12,300	$ 12,300
2024 Convertible Senior Notes \| Measurement Input, Risk Free Interest Rate [Member] \| ASC 470-20
Debt Instrument [Line Items]
Fair value assumed, interest rate			0.05