Revenue from Contracts with Customers - Summary of Revenue by Type and Nature of Revenue Stream by Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Disaggregation Of Revenue [Line Items]
Recurring revenue	$ 349,455			$ 349,404			$ 1,048,204	$ 1,063,440
Non-recurring revenue	94,729			83,026			272,489	244,176
Total revenue	444,184	$ 444,460	$ 432,049	432,430	$ 441,464	$ 433,722	1,320,693	1,307,616
Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,825			(8,558)			10,400	(13,567)
Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	396,679			402,213			1,194,976	1,226,104
Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	41,680			38,775			115,317	95,079
Software delivery, Support and Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	284,373			274,138			844,908	839,176
Software delivery, Support and Maintenance [Member] | Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	5,363			(2,690)			9,611	(3,382)
Software delivery, Support and Maintenance [Member] | Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	241,516			241,142			726,310	752,650
Software delivery, Support and Maintenance [Member] | Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	37,494			35,686			108,987	89,908
Client services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	159,811			158,292			475,785	468,440
Client services [Member] | Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	462			(5,868)			789	(10,185)
Client services [Member] | Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	155,163			161,071			468,666	473,454
Client services [Member] | Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 4,186			$ 3,089			$ 6,330	$ 5,171