Accounting Policies Accounting Policies (Details 2) (USD $)	9 Months Ended
	Oct. 31, 2013
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	$ (103,203,000)
OCI before reclassifications	16,149,000
Loss reclassified from accumulated OCI	3,533,000
Total other comprehensive income	19,682,000
Balance, October 31, 2013	(83,521,000)
Securities
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	(208,000)
OCI before reclassifications	365,000
Loss reclassified from accumulated OCI	0
Total other comprehensive income	365,000
Balance, October 31, 2013	157,000
Foreign Currency Translation
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	42,000
OCI before reclassifications	(158,000)
Loss reclassified from accumulated OCI	0
Total other comprehensive income	(158,000)
Balance, October 31, 2013	(116,000)
Interest rate Contracts
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	(103,037,000)
OCI before reclassifications	15,942,000
Loss reclassified from accumulated OCI	3,533,000
Total other comprehensive income	19,475,000
Balance, October 31, 2013	$ (83,562,000)