Financing Receivables (Details) (USD $)	3 Months Ended
	Jun. 30, 2011	Mar. 31, 2011
Financing Receivables [Abstract]
Minimum finance receivable deferred payment term (in years)	1Y
Annual interest rate on loan receivable (in hundredths)	7.00%
Interest payment received on loan receivable	$ 2,400,000
Loan receivable	5,600,000
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	2,474,000	6,439,000
30-90 days past invoice date	372,000	503,000
Greater than 90 days past invoice date	746,000	219,000
Unbilled	47,843,000	48,004,000
Receivables	51,435,000	55,165,000
Allowance for credit losses on financing receivables	417,000	389,000
Pass Rating [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	2,474,000	6,439,000
30-90 days past invoice date	328,000	434,000
Greater than 90 days past invoice date	609,000	179,000
Unbilled	47,607,000	47,724,000
Receivables	51,018,000	54,776,000
Pass Rating [Member] | Software products [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	2,474,000	6,439,000
30-90 days past invoice date	328,000	434,000
Greater than 90 days past invoice date	609,000	179,000
Unbilled	40,758,000	37,971,000
Receivables	44,169,000	45,023,000
Pass Rating [Member] | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unbilled	6,849,000	9,753,000
Receivables	6,849,000	9,753,000
Watch Rating [Member] | Software products [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	0	0
30-90 days past invoice date	44,000	69,000
Greater than 90 days past invoice date	137,000	40,000
Unbilled	236,000	280,000
Receivables	$ 417,000	$ 389,000