Accounting Policies Accounting Policies (Details 3) (USD $)	3 Months Ended
	Apr. 30, 2013
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	$ 611,000
Interest Expense [Member] | Interest Rate Contracts [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	954,000
Equity in Loss of Unconsolidated Entities [Member] | Interest Rate Contracts [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	45,000
Total Before Income Tax and Noncontrolling Interest [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	999,000
Income Tax Benefit [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	(384,000)
Noncontrolling Interest [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	(4,000)
Loss Reclassified from Accumulated OCI [Member]
Reclassification Out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications from Accumulated Other Comprehensive Income, net of tax and noncontrolling interests	$ 611,000