Senior and Subordinated Debt (Tables)

3 Months Ended

Apr. 30, 2012

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:

	April 30, 2012		January 31, 2012
	(in thousands)
Senior Notes:
3.625% Puttable Equity-Linked Senior Notes due 2014, net of discount	$	199,213	$	199,132
7.625% Senior Notes due 2015		178,253		178,253
5.000% Convertible Senior Notes due 2016		50,000		50,000
6.500% Senior Notes due 2017		132,144		132,144
4.250% Convertible Senior Notes due 2018		350,000		350,000
7.375% Senior Notes due 2034		100,000		100,000
Total Senior Notes		1,009,610		1,009,529
Subordinated Debt:
Subordinate Tax Revenue Bonds due 2013		29,000		29,000
Total Senior and Subordinated Debt	$	1,038,610	$	1,038,529