Stock Benefit Plans and Stock-Based Compensation (Details) (USD $)	3 Months Ended		6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional common shares authorized (in shares)	13,500,000
Aggregate amount of common shares reserved by the Company to be awarded	41,500,000		41,500,000
Stock options, weighted average fair value assumptions [Abstract]
Fair value of stock options vested (in dollars per share)			$ 4.58	$ 4.42
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	$ 6,660,000	$ 3,891,000	$ 11,983,000	$ 9,195,000
Unrecognized compensation cost, net of estimated forfeitures	52,100,000		52,100,000
Unrecognized compensation cost, weighted-average period of recognition (in years)	2.82		2.82
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of employee compensation allowed to be withheld (in hundredths)			10.00%
Discount rate for purchase of common stock (in hundredths)			5.00%
LTIP (2007) [Member] | Perfomance-based Restricted Stock Unit Awards [Member]
Non-vested restricted stock units and performance-based restricted stock unit awards [Roll Forward]
Non-vested awards outstanding as of end of period (in shares)	1,500,000		1,500,000
Covisint LTIP (2009) [Member] | Stock Options [Member]
Stock option activity [Roll Forward]
Options outstanding as of end of period (in shares)	135,000		135,000
Options outstanding as of end of period (in shares)	135,000		135,000
Stock Options [Member]
Stock option activity [Roll Forward]
Options outstanding as of beginning of period (in shares)			16,868,000
Granted (in shares)			7,796,000
Exercised (in shares)			(684,000)
Forfeited (in shares)			(227,000)
Cancelled/expired (in shares)			(679,000)
Options outstanding as of end of period (in shares)	23,074,000		23,074,000
Options vested and expected to vest, net of estimated forfeitures, as of end of period (in shares)	21,228,000		21,228,000
Options exercisable as of end of period (in shares)	10,406,000		10,406,000
Options outstanding as of end of period (in shares)	23,074,000		23,074,000
Weighted average exercise price [Abstract]
Options outstanding as of beginning of period (in dollars per share)			$ 8.18
Granted (in dollars per share)	$ 8.05		$ 8.05
Exercised (in dollars per share)	$ 8.22		$ 8.22
Forfeited (in dollars per share)	$ 8.84		$ 8.84
Cancelled/expired (in dollars per share)	$ 12.19		$ 12.19
Options outstanding as of end of period (in dollars per share)	$ 8.00		$ 8.00
Options vested and expected to vest, net of estimated forfeitures, as of end of period (in dollars per share)	$ 7.95		$ 7.95
Options exercisable as of end of period (in dollars per share)	$ 7.63		$ 7.63
Weighted average remaining contractual term [Abstract]
Options outstanding as of end of period (in years)	7.10		7.10
Options vested and expected to vest, net of estimated forfeitures, as of end of period (in years)	6.93		6.93
Options exercisable as of end of period (in years)	4.90		4.90
Aggregate intrinsic value [Abstract]
Exercised			1,624,000
Options outstanding as of end of period	13,561,000		13,561,000
Options vested and expected to vest, net of estimated forfeitures, as of end of period	13,095,000		13,095,000
Options exercisable as of end of period	6,470,000		6,470,000
Stock options, weighted average fair value assumptions [Abstract]
Expected volatility (in hundredths)			39.87%	42.56%
Risk-free interest rate (in hundredths)			1.72%	2.75%
Expected lives at date of grant (in years)			5.8	6.0
Weighted-average fair value of the options granted			$ 4.04	$ 3.71
Non-vested Restricted Stock Units and Performance-Based Restricted Stock Unit Awards [Member]
Aggregate intrinsic value [Abstract]
Released			3,210,000
Non-vested restricted stock units and performance-based restricted stock unit awards [Roll Forward]
Non-vested awards outstanding as of beginning of period (in shares)			3,741,000
Granted (in shares)			1,286,000
Released (in shares)			(313,000)
Forfeited (in shares)			(7,000)
Non-vested awards outstanding as of end of period (in shares)	4,707,000		4,707,000
Weighted Average Grant-Date Fair Value [Abstract]
Granted (in dollars per share)			$ 9.85
Cost of maintenance and subscription fees [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	306,000	99,000	462,000	159,000
Cost of professional services [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	555,000	255,000	1,175,000	492,000
Technology development and support [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	750,000	348,000	1,080,000	515,000
Sales and marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	1,767,000	1,152,000	3,053,000	2,930,000
Administrative and general [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense before income taxes	$ 3,282,000	$ 2,037,000	$ 6,213,000	$ 5,099,000