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
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation Of Revenue [Line Items]
Recurring revenue	$ 348,636	$ 352,660
Non-recurring revenue	83,413	81,062
Total revenue	432,049	433,722
Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	4,326	491
Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	392,607	410,424
Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	35,116	22,807
Software delivery, Support and Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	275,512	280,553
Software delivery, Support and Maintenance [Member] | Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	4,115	1,384
Software delivery, Support and Maintenance [Member] | Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	237,355	257,754
Software delivery, Support and Maintenance [Member] | Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	34,042	21,415
Client services [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	156,537	153,169
Client services [Member] | Unallocated [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	211	(893)
Client services [Member] | Provider [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	155,252	152,670
Client services [Member] | Veradigm [Member] | Operating Segments [Member]
Disaggregation Of Revenue [Line Items]
Total revenue	$ 1,074	$ 1,392