Debt Outstanding Excluding Capital Lease Obligations (Detail) - USD ($) $ in Thousands	Dec. 31, 2016		Dec. 31, 2015	Jun. 18, 2013
Debt Instrument [Line Items]
Principal Balance	$ 1,386,813		$ 692,058
Unamortized Discount and Debt Issuance Costs	74,433		67,475
Net Carrying Amount	1,312,380		624,583
Principal Balance, Current	15,638		12,657
Unamortized Discount and Debt Issuance Costs, Current	480		479
Net Carrying Amount, Current	15,158		12,178
Principal Balance, Noncurrent	1,366,824		679,401
Unamortized Discount and Debt Issuance Costs, Noncurrent	72,053		66,996
Net Carrying Amount, Noncurrent	1,294,771		612,405
Netsmart [Member]
Debt Instrument [Line Items]
Principal Balance	4,351		0
Unamortized Discount and Debt Issuance Costs, Current	1,900		0
Net Carrying Amount, Current	2,451		0
1.25% Cash Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance	345,000	[1]	345,000	$ 345,000
Unamortized Discount and Debt Issuance Costs	49,186		61,771
Net Carrying Amount	295,814		283,229
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Principal Balance	441,875		346,875
Unamortized Discount and Debt Issuance Costs	4,691		5,704
Net Carrying Amount	437,184		341,171
Netsmart Non-Recourse Debt First Lien Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance	432,925		0
Unamortized Discount and Debt Issuance Costs	11,655		0
Net Carrying Amount	421,270		0
Netsmart Non-Recourse Debt Second Lien Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance	167,000		0
Unamortized Discount and Debt Issuance Costs	8,901		0
Net Carrying Amount	158,099		0
Other Debt [Member]
Debt Instrument [Line Items]
Principal Balance	13		183
Unamortized Discount and Debt Issuance Costs	0		0
Net Carrying Amount	$ 13		$ 183

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