Financing Receivables (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2013	Mar. 31, 2013
Financing Receivables [Abstract]
Minimum finance receivable deferred payment term	1 year
Annual interest rate on loan receivable (in hundredths)	7.00%
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	$ 1,202	$ 3,311
30-90 days past invoice date	991	679
Greater than 90 days past invoice date	474	1,503
Unbilled	45,256	46,430
Total financing receivables	47,923	51,923
Allowance for credit losses on financing receivables	170,000	179,000
Pass Rating [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	1,202	3,311
30-90 days past invoice date	991	679
Greater than 90 days past invoice date	304	1,324
Unbilled	45,256	46,430
Total financing receivables	47,753	51,744
Pass Rating [Member] | Software products [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
0-29 days past invoice date	1,202	3,311
30-90 days past invoice date	991	679
Greater than 90 days past invoice date	304	1,324
Unbilled	41,929	42,659
Total financing receivables	44,426	47,973
Pass Rating [Member] | Loans [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Unbilled	3,327	3,771
Total financing receivables	3,327	3,771
Watch Rating [Member] | Software products [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Greater than 90 days past invoice date	170	179
Total financing receivables	$ 170	$ 179