Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Software and hardware	$ 21,899	$ 35,074	$ 71,463	$ 95,845
Implementation and training services	7,266	6,555	27,847	18,121
System sales	29,165	41,629	99,310	113,966
Maintenance	39,463	36,245	116,746	102,961
Electronic data interchange services	15,209	12,101	44,056	36,178
Revenue cycle management and related services	15,015	11,147	43,902	34,170
Other services	15,658	11,643	44,920	33,566
Maintenance, EDI, RCM and other services	85,345	71,136	249,624	206,875
Total revenues	114,510	112,765	348,934	320,841
Cost of revenue:
Software and hardware	4,660	4,622	16,055	13,423
Implementation and training services	7,221	5,994	23,873	15,119
Total cost of system sales	11,881	10,616	39,928	28,542
Maintenance	5,259	4,412	14,811	12,260
Electronic data interchange services	9,852	7,890	28,251	23,816
Revenue cycle management and related services	10,918	8,405	32,344	25,687
Other services	8,686	7,011	26,021	18,977
Total cost of maintenance, EDI, RCM and other services	34,715	27,718	101,427	80,740
Total cost of revenue	46,596	38,334	141,355	109,282
Gross profit	67,914	74,431	207,579	211,559
Operating expenses:
Selling, general and administrative	35,532	33,096	110,045	94,651
Research and development costs	7,786	8,277	22,634	22,462
Amortization of acquired intangible assets	1,212	543	3,665	1,545
Total operating expenses	44,530	41,916	136,344	118,658
Income from operations	23,384	32,515	71,235	92,901
Interest income	13	55	(14)	212
Other expense, net	122	218	115	400
Income before provision for income taxes	23,275	32,352	71,106	92,713
Provision for income taxes	7,649	11,247	24,292	32,129
Net income	15,626	21,105	46,814	60,584
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	10	(9)	0	(7)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	(12)	0	(35)
Comprehensive income	$ 15,636	$ 21,084	$ 46,814	$ 60,542
Net income per share:
Basic (in usd per share)	$ 0.26	$ 0.36	$ 0.79	$ 1.03
Diluted (in usd per share)	$ 0.26	$ 0.36	$ 0.79	$ 1.03
Weighted-average shares outstanding:
Basic (in usd per share)	59,400	58,847	59,343	58,623
Diluted (in usd per share)	59,405	59,128	59,411	58,943
Dividends declared per common share	$ 0.175	$ 0.175	$ 0.525	$ 0.525