Goodwill Impairment Loss and Other Charges Goodwill Impairment Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Oct. 31, 2015	Oct. 31, 2014	Oct. 31, 2015	Oct. 31, 2014	Jan. 31, 2015
Goodwill [Line Items]
Goodwill impairment loss	$ 7,413	$ 0	$ 7,413	$ 0
Goodwill, Impaired, Accumulated Impairment Loss	7,413	0	7,413	0
Goodwill, Gross	52,209	25,234	52,209	25,234
Goodwill	44,796	25,234	44,796	25,234	$ 52,148
Vista Reporting Unit [Member]
Goodwill [Line Items]
Reporting Unit, Amount of Fair Value in Excess (short fall) of Carrying Amount	$ (8,357)		$ (8,357)
Reporting Unit, Percentage of Fair Value in Excess (Short fall) of Carrying Amount	(35.00%)		(35.00%)
Goodwill impairment loss	$ 7,413	0	$ 7,413	0
Goodwill, Gross	11,497	11,497	11,497	11,497
Goodwill	$ 4,084	$ 11,497	$ 4,084	$ 11,497