Notes Payable (Tables)

9 Months Ended

Oct. 31, 2012

Notes Payable

As of	October 31, 2012		January 31, 2012
4.00% Debentures due 2031	$	217,179	$	213,224
Other	1,381		1,349
Notes payable	$	218,560	$	214,573

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	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	October 31, 2012			January 31, 2012
Principal amount	$	253,000		$	253,000
Unamortized debt discount	(35,821		)	(39,776		)
Net carrying amount of the liability component	$	217,179		$	213,224
Equity component	$	43,930		$	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 income related to the 4.00% Debentures:

	Three months ended October 31,				Nine months ended October 31,
	2012		2011		2012		2011
Interest expense at the contractual interest rate	$	2,530	$	2,530	$	7,590	$	5,819
Amortization of debt discount	$	1,342	$	1,250	$	3,955	$	2,882

6.25% Debentures due 2026, issued 2006

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 income related to the 6.25% Debentures:

	Three months ended October 31,				Nine months ended October 31,
	2012		2011		2012		2011
Interest expense at the contractual interest rate	$	—	$	—	$	—	$	2,900
Amortization of debt discount	$	—	$	—	$	—	$	793