Accounting Policies Accounting Policies (Details 2) (USD $)	3 Months Ended
	Apr. 30, 2013
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	$ (103,203,000)
OCI before reclassifications	(216,000)
Loss reclassified from accumulated OCI	611,000
Total other comprehensive income	395,000
Balance, April 30, 2013	(102,808,000)
Securities
Schedule of Changes in Accumulated Other Comprehensive Income [Line Items]
Balance, February 1, 2013	(208,000)
OCI before reclassifications	132,000
Loss reclassified from accumulated OCI	0
Total other comprehensive income	132,000
Balance, April 30, 2013	(76,000)
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, April 30, 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	(190,000)
Loss reclassified from accumulated OCI	611,000
Total other comprehensive income	421,000
Balance, April 30, 2013	$ (102,616,000)