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Bank Revolving Credit Facility (Tables)
 6 Months Ended
Jul. 31, 2013
Debt Disclosure [Abstract]  
Available credit on the bank revolving credit facility
The following table summarizes the available credit on the Credit Facility:
 
July 31, 2013
January 31, 2013
 
(in thousands)
Maximum borrowings
$
500,000

$
450,000

Less outstanding balances:
 
 
Borrowings
—

—

Letters of credit
56,920

67,456

Surety bonds
—

—

Reserve for retirement of indebtedness (1)
132,144

—

Available credit
$
310,936

$
382,544


(1)
On August 23, 2013, this reserve for retirement of indebtedness was removed in conjunction with the redemption of the 6.500% Senior Notes due 2017 (See Note D – Senior and Subordinated Debt)