Segments (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Oct. 31, 2011	Jul. 31, 2011	Apr. 30, 2011	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2011
Summary of net revenues by geographic region
Software licenses									$ 43,322	$ 54,913	$ 51,382
Maintenance and professional services									137,803	141,669	143,974
Total revenue	49,906	53,164	52,448	47,919	57,532	55,658	57,159	49,192	203,437	219,541	214,386
United States of America [Member]
Summary of net revenues by geographic region
Software licenses									24,993	31,657	32,089
Maintenance and professional services									107,432	108,835	113,102
Total revenue									132,425	140,492	145,191
Europe, Asia and South America [Member]
Summary of net revenues by geographic region
Software licenses									18,331	23,256	19,293
Maintenance and professional services									52,681	55,793	49,902
Total revenue									$ 71,012	$ 79,049	$ 69,195