Consolidated Statements of Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Software, hardware and supplies	$ 23,720	$ 31,860	$ 49,564	$ 60,771
Implementation and training services	8,535	6,094	20,581	11,566
System sales	32,255	37,954	70,145	72,337
Maintenance	38,715	35,214	77,283	66,716
Electronic data interchange services	15,024	11,985	28,847	24,077
Revenue cycle management and related services	14,486	11,142	28,887	23,023
Other services	15,648	11,339	29,262	21,923
Maintenance, EDI, RCM and other services	83,873	69,680	164,279	135,739
Total revenues	116,128	107,634	234,424	208,076
Cost of revenue:
Software, hardware and supplies	5,624	4,187	11,395	8,801
Implementation and training services	7,507	5,050	16,652	9,125
Total cost of system sales	13,131	9,237	28,047	17,926
Maintenance	4,741	3,994	9,552	7,848
Electronic data interchange services	9,151	7,964	18,399	15,926
Revenue cycle management and related services	10,556	8,456	21,426	17,282
Other services	8,785	6,369	17,335	11,966
Total cost of maintenance, EDI, RCM and other services	33,233	26,783	66,712	53,022
Total cost of revenue	46,364	36,020	94,759	70,948
Gross profit	69,764	71,614	139,665	137,128
Operating expenses:
Selling, general and administrative	37,832	32,169	74,513	61,555
Research and development costs	6,272	7,358	14,848	14,185
Amortization of acquired intangible assets	1,316	520	2,453	1,002
Total operating expenses	45,420	40,047	91,814	76,742
Income from operations	24,344	31,567	47,851	60,386
Interest income	(62)	75	(27)	157
Other expense, net	(220)	144	(7)	182
Income before provision for income taxes	24,502	31,498	47,831	60,361
Provision for income taxes	8,811	11,002	16,643	20,882
Net income	15,691	20,496	31,188	39,479
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	47	6	(10)	2
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0	(12)	0	(23)
Comprehensive income	$ 15,738	$ 20,490	$ 31,178	$ 39,458
Net income per share:
Basic (in usd per share)	$ 0.26	$ 0.35	$ 0.53	$ 0.67
Diluted (in usd per share)	$ 0.26	$ 0.35	$ 0.53	$ 0.67
Weighted-average shares outstanding:
Basic (in usd per share)	59,347	58,664	59,314	58,511
Diluted (in usd per share)	59,386	59,005	59,386	58,902
Dividends declared per common share	$ 0.175	$ 0.175	$ 0.350	$ 0.350