Discontinued Operations (Schedule of Assets and Liabilities Included in Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	Oct. 31, 2012	Jan. 31, 2012
ASSETS
Total current assets	$ 0	$ 489,428
LIABILITIES
Total current liabilities	0	574,579
Comverse and Starhome Dispositions
ASSETS
Cash and cash equivalents		193,192
Restricted cash		28,893
Accounts receivable, net of allowance of $9,273		135,835
Inventories		29,991
Deferred cost of revenue		35,252
Deferred income taxes		10,108
Prepaid expenses and other current assets		56,157
Total current assets		489,428
Property and equipment, net		45,860
Goodwill		163,076
Intangible assets		22,034
Deferred cost of revenue		108,107
Deferred income taxes		10,153
Other assets		65,592
Total assets		904,250
LIABILITIES
Accounts payable and accrued expenses		196,879
Deferred revenue		365,803
Deferred income taxes		8,742
Income taxes payable		2,302
Other current liabilities		853
Total current liabilities		574,579
Deferred revenue		204,681
Deferred income taxes		45,205
Note payable to CTI		8,536
Other long-term liabilities		154,025
Total liabilities		987,026
Allowance for doubtful accounts receivable		$ 9,273