Debt Outstanding Excluding Capital Leases (Detail) - USD ($) $ in Thousands	Jun. 30, 2016		Dec. 31, 2015
Debt Instrument [Line Items]
Principal Balance	$ 1,267,696		$ 692,058
Unamortized Discount and Debt Issuance Costs	87,937		67,475
Net Carrying Amount	1,179,759		624,583
Principal Balance, Current	12,570		12,657
Unamortized Discount and Debt Issuance Costs, Current	493		479
Net Carrying Amount, Current	12,077		12,178
Principal Balance, Noncurrent	1,239,326		679,401
Unamortized Discount and Debt Issuance Costs, Noncurrent	83,246		66,996
Net Carrying Amount, Noncurrent	1,156,080		612,405
Netsmart [Member]
Debt Instrument [Line Items]
Principal Balance, Current	15,800		0
Unamortized Discount and Debt Issuance Costs, Current	4,198		0
Net Carrying Amount, Current	11,602		0
1.25% Cash Convertible Senior Notes [Member]
Debt Instrument [Line Items]
Principal Balance	345,000	[1]	345,000
Unamortized Discount and Debt Issuance Costs	55,554		61,771
Net Carrying Amount	289,446		283,229
Senior Secured Credit Facility [Member]
Debt Instrument [Line Items]
Principal Balance	360,625		346,875
Unamortized Discount and Debt Issuance Costs	5,366		5,704
Net Carrying Amount	355,259		341,171
Netsmart First Lien Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance	395,000		0
Unamortized Discount and Debt Issuance Costs	17,319		0
Net Carrying Amount	377,681		0
Netsmart Second Lien Term Loan [Member]
Debt Instrument [Line Items]
Principal Balance	167,000		0
Unamortized Discount and Debt Issuance Costs	9,698		0
Net Carrying Amount	157,302		0
Other Debt [Member]
Debt Instrument [Line Items]
Principal Balance	71		183
Unamortized Discount and Debt Issuance Costs	0		0
Net Carrying Amount	$ 71		$ 183

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