Selected Quarterly Operating Results (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Software license and hardware	$ 18,497	$ 16,150	$ 19,687	$ 16,189	$ 21,144	$ 21,428	$ 19,316	$ 19,761	$ 70,523	$ 81,649	$ 79,366
Software related subscription services	19,015	11,705	12,437	12,246	13,326	11,864	9,687	9,715	55,403	44,592	27,335
Total software, hardware and related	37,512	27,855	32,124	28,435	34,470	33,292	29,003	29,476	125,926	126,241	106,701
Support and maintenance	39,792	39,519	42,176	43,713	43,234	43,045	42,135	40,805	165,200	169,219	160,060
Electronic data interchange and data services	20,376	21,594	20,793	20,243	19,720	20,392	17,432	16,693	82,343	76,358	67,295
Revenue cycle management and related services	20,930	20,643	20,581	20,189	20,082	19,051	18,906	18,319	83,006	74,237	62,976
Professional services	9,302	7,421	9,695	9,584	10,882	7,644	13,043	12,601	36,002	44,170	47,635
Total revenues	127,912	117,032	125,369	122,164	128,388	123,424	120,519	117,894	492,477	490,225	444,667
Cost of revenue:
Software license and hardware	7,357	6,530	6,578	7,041	6,477	7,295	7,475	7,556	27,506	28,803	49,272
Software related subscription services	9,168	5,533	5,963	5,958	5,643	5,194	5,384	4,451	26,622	20,672	12,374
Total software, hardware and related	16,525	12,063	12,541	12,999	12,120	12,489	12,859	12,007	54,128	49,475	61,646
Support and maintenance	7,455	7,537	8,394	7,943	7,802	7,365	6,785	6,914	31,329	28,866	22,590
Electronic data interchange and data services	14,018	14,381	14,680	14,512	14,252	14,246	13,202	12,706	50,153	48,244	42,567
Revenue cycle management and related services	12,851	12,437	12,539	12,326	12,274	11,956	12,015	11,999	57,591	54,406	46,203
Professional services	8,406	7,367	8,444	8,197	9,393	8,304	11,912	12,564	32,414	42,173	47,157
Total cost of revenue	59,255	53,785	56,598	55,977	55,841	54,360	56,773	56,190	225,615	223,164	220,163
Gross profit	68,657	63,247	68,771	66,187	72,547	69,064	63,746	61,704	266,862	267,061	224,504
Operating expenses:
Selling, general and administrative	40,272	39,395	37,396	39,171	41,279	41,482	38,681	36,730	156,234	158,172	149,214
Research and development costs, net	16,077	14,518	17,981	17,085	17,638	18,468	16,898	16,236	65,661	69,240	41,524
Amortization of other intangibles	2,675	897	898	897	898	904	908	983	5,367	3,693	4,805
Impairment of assets	32,238	0	0	0	0	0	0	0	32,238	0	5,873
Total operating expenses	91,262	54,810	56,275	57,153	59,815	60,854	56,487	53,949	259,500	231,105	201,416
Income from operations	(22,605)	8,437	12,496	9,034	12,732	8,210	7,259	7,755	7,362	35,956	23,088
Interest income	27	55	44	302	40	(52)	70	54	428	111	269
Interest expense	(1,295)	(6)	(3)	0	(311)	(30)	(1)	0	(1,304)	(341)	0
Other expense, net	(19)	(43)	(54)	(50)	(45)	0	(26)	9	(166)	(62)	(356)
Income before provision for income taxes	(23,892)	8,443	12,483	9,286	12,416	8,128	7,302	7,818	6,320	35,664	23,001
Provision for income taxes	(7,570)	1,141	4,168	2,924	1,673	1,452	2,552	2,655	663	8,332	7,321
Net income	$ (16,322)	$ 7,302	$ 8,315	$ 6,362	$ 10,743	$ 6,676	$ 4,750	$ 5,163	$ 5,657	$ 27,332	$ 15,680
Net income per share:
Basic	$ (0.27)	$ 0.12	$ 0.14	$ 0.11	$ 0.18	$ 0.11	$ 0.08	$ 0.09	$ 0.09	$ 0.45	$ 0.26
Diluted	$ (0.27)	$ 0.12	$ 0.14	$ 0.10	$ 0.18	$ 0.11	$ 0.08	$ 0.08	$ 0.09	$ 0.45	$ 0.26
Weighted-average shares outstanding:
Basic	60,899	60,867	60,461	60,312	60,288	60,272	60,247	60,230	60,635	60,259	59,918
Diluted	60,899	61,279	61,194	61,064	60,956	60,855	60,788	60,770	61,233	60,849	60,134
Dividends declared per common share	$ 0	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.175	$ 0.525	$ 0.7	$ 0.7