Senior and Subordinated Debt (Tables)

9 Months Ended

Oct. 31, 2011

Bank Revolving Credit Facility and Senior and Subordinated Debt [Abstract]

Schedule of senior and subordinated debt

The following table summarizes the Company’s senior and subordinated debt:

	October 31, 2011		January 31, 2011
	(in thousands)
Senior Notes:
3.625% Puttable Equity-Linked Senior Notes due 2011, net of discount	$	–	$	45,480
3.625% Puttable Equity-Linked Senior Notes due 2014, net of discount		199,050		198,806
7.625% Senior Notes due 2015		178,253		178,253
5.000% Convertible Senior Notes due 2016		50,000		90,000
6.500% Senior Notes due 2017		132,144		132,144
4.250% Convertible Senior Notes due 2018		350,000		–
7.375% Senior Notes due 2034		100,000		100,000
Total Senior Notes		1,009,447		744,683
Subordinated Debt:
Subordinate Tax Revenue Bonds due 2013		29,000		29,000
Total Senior and Subordinated Debt	$	1,038,447	$	773,683

Schedule of carrying amounts of the debt and equity balances

The following table summarizes the carrying amounts of the Company’s debt and equity balances related to the 2011 Notes:

	January 31, 2011
	(in thousands)
Carrying amount of equity component	$	7,484
Outstanding principal amount of the puttable equity-linked senior notes		46,891
Unamortized discount		(1,411	)
Net carrying amount of the puttable equity-linked senior notes	$	45,480