Operating Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Segment Operating Data
Revenue	$ 108,994	$ 112,765	$ 107,634	$ 100,442	$ 97,108	$ 91,871	$ 81,457	$ 82,927	$ 429,835	$ 353,363	$ 291,811
Operating income	23,298	32,515	31,567	28,819	28,461	25,781	20,823	19,027	116,199	94,092	75,724
QSI Dental Division [Member]
Segment Operating Data
Revenue									19,596	19,966	17,128
Operating income									3,352	4,672	3,460
NextGen Division [Member]
Segment Operating Data
Revenue									325,467	266,546	228,730
Operating income									127,032	104,391	87,432
Hospital Solutions Division [Member]
Segment Operating Data
Revenue									34,463	17,898	2,891
Operating income									10,417	5,362	676
RCM Services Division [Member]
Segment Operating Data
Revenue									50,309	48,953	43,062
Operating income									5,835	4,235	2,314
Unallocated corporate expense [Member]
Segment Operating Data
Operating income									$ (30,437)	$ (24,568)	$ (18,158)