Notes Payable (Tables)

6 Months Ended

Jul. 31, 2011

Notes payable

Notes payable consist of the following:

As of	July 31, 2011		January 31, 2011
4.00% Debentures due 2031	$	210,702	$	—
6.25% Debentures due 2026, issued 2006		—		157,843
6.25% Debentures due 2026, issued fiscal 2011		—		31,705
Term Loan due 2013		—		18,500
Other		1,325		1,300
Notes payable		212,027		209,348
Term Loan due 2013, current portion		—		(2,000	)
Notes payable, long-term	$	212,027	$	207,348

Redemption Prices Expressed as a Percentage of Principal, Plus any Accrued and Unpaid Interest

We may redeem some or all of the 4.00% Debentures for cash on or after April 5, 2016 at the following redemption prices expressed as a percentage of principal, plus any accrued and unpaid interest:

Period	Redemption Price
Beginning on April 5, 2016 and ending on March 31, 2017		101.143	%
Beginning on April 1, 2017 and ending on March 31, 2018		100.571	%
On April 1, 2018 and thereafter		100.000	%

4.00% Debentures due 2031

Principal Amount, Unamortized Debt Premium (Discount), Net Carrying Amount of the Liability Component, and Carrying Amount of the Equity Component

The principal amount, unamortized debt discount, net carrying amount of the liability component, and carrying amount of the equity component of the 4.00% Debentures are as follows:

As of	July 31, 2011
Principal amount	$	253,000
Unamortized debt discount		(42,298	)
Net carrying amount of the liability component	$	210,702
Equity component	$	43,930

Recognized Amounts in Interest Expense in the Condensed Consolidated Statement of Operations Related to Debentures

We recognized the following amounts in interest expense in the condensed consolidated statement of operations related to the 4.00% debentures:

	Three months ended July 31, 2011		Six months ended July 31, 2011
Interest expense at the contractual interest rate	$	2,530	$	3,289
Amortization of debt discount	$	1,228	$	1,632

6.25% Debentures due 2026, issued 2006

Principal Amount, Unamortized Debt Premium (Discount), Net Carrying Amount of the Liability Component, and Carrying Amount of the Equity Component

The principal amount, unamortized debt discount, net carrying amount of the liability component, and carrying amount of the equity component of the 6.25% Debentures, issued 2006, were as follows:

As of	July 31, 2011		January 31, 2011
Principal amount	$	—	$	165,000
Unamortized debt discount		—		(7,157	)
Net carrying amount of the liability component	$	—	$	157,843
Equity component	$	—	$	21,766

Recognized Amounts in Interest Expense in the Condensed Consolidated Statement of Operations Related to Debentures

We recognized the following amounts in interest expense in the condensed consolidated statements of operations related to the 6.25% Debentures, issued 2006:

	Three months ended July 31,				Six months ended July 31,
	2011		2010		2011		2010
Interest expense at the contractual interest rate	$	—	$	2,588	$	2,900	$	5,166
Amortization of debt discount	$	—	$	745	$	793	$	1,474

6.25% Debentures due 2026, issued fiscal 2011

Principal Amount, Unamortized Debt Premium (Discount), Net Carrying Amount of the Liability Component, and Carrying Amount of the Equity Component

The principal amount, unamortized premium, and net carrying amount of the 6.25% Debentures, issued fiscal 2011, were as follows:

As of	July 31, 2011		January 31, 2011
Principal amount	$	—	$	31,509
Unamortized debt premium		—		196
Net carrying amount of the liability component	$	—	$	31,705