Other Assets (Tables)

12 Months Ended

Jan. 31, 2013

Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]

Components Other Assets

	January 31,
	2013		2012
	(in thousands)
Lease procurement costs, net	$	211,856	$	227,568
Prepaid expenses and other deferred costs, net	240,594		227,354
Intangible assets, net	85,692		107,192
Mortgage procurement costs, net	76,450		46,427
Other Assets	$	614,592	$	608,541

Schedule of Finite-Lived Intangible Assets, Future Amortization Expense

The estimated aggregate amortization expense related to intangible assets is as follows:

Years Ending January 31,
	(in thousands)
2014	$	5,695
2015	4,500
2016	4,310
2017	3,720
2018	3,558