Interest Expense (Detail) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Debt Instrument [Line Items]
Total interest expense		$ 20,290	$ 16,421	$ 40,470	$ 23,390
Convertible Senior Notes and Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Interest expense		4,668	3,595	9,502	7,133
Amortization of discounts and debt issuance costs		3,612	3,448	7,193	6,879
Netsmart [Member]
Debt Instrument [Line Items]
Amortization of discounts and debt issuance costs		846	848	1,694	848
Interest expense	[1]	$ 11,164	$ 8,530	$ 22,081	$ 8,530

[1] Includes interest expense related to capital leases.