Summary of Future Debt Payment Obligations (Detail) - USD ($) $ in Thousands		Jun. 30, 2017		Dec. 31, 2016
Debt Instrument [Line Items]
Total		$ 1,395,874		$ 1,386,813
Remainder of 2017		11,551
2018		32,476
2019		44,976
2020		724,351
2021		4,351
Thereafter		578,169
1.25% Cash Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Total		345,000	[1]	$ 345,000
Remainder of 2017	[1]	0
2018	[1]	0
2019	[1]	0
2020	[1]	345,000
2021	[1]	0
Thereafter	[1]	0
Term Loan [Member]
Debt Instrument [Line Items]
Total	[2]	228,125
Remainder of 2017	[2]	9,375
2018	[2]	28,125
2019	[2]	40,625
2020	[2]	150,000
2021	[2]	0
Thereafter	[2]	0
Netsmart First Lien Term Loan [Member]
Debt Instrument [Line Items]
Total		430,749
Remainder of 2017		2,176
2018		4,351
2019		4,351
2020		4,351
2021		4,351
Thereafter		411,169
Netsmart Second Lien Term Loan [Member]
Debt Instrument [Line Items]
Total		167,000
Remainder of 2017		0
2018		0
2019		0
2020		0
2021		0
Thereafter		167,000
Revolving Facility [Member]
Debt Instrument [Line Items]
Total	[2]	225,000
Remainder of 2017	[2]	0
2018	[2]	0
2019	[2]	0
2020	[2]	225,000
2021	[2]	0
Thereafter	[2]	$ 0

[1] Assumes no cash conversions of the 1.25% Notes prior to their maturity on July 1, 2020.

[2] Assumes no additional borrowings after June 30, 2017, payment of any required periodic installments of principal and that all drawn amounts are repaid upon maturity.