Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Oct. 31, 2013	Jan. 31, 2013
Accumulated depreciation of rental assets	$ 17,041	$ 18,827
Accumulated depreciation of property, equipment and improvements	$ 227,979	$ 227,469
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	5,000,000	5,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	11,944,544	11,944,544
Common stock, shares outstanding	8,143,317	8,146,513
Treasury stock, shares	3,801,227	3,798,031