VPT LOANS - Additional Information (Detail)		1 Months Ended	9 Months Ended
	Jul. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)	Jul. 01, 2016 USD ($) installment	Oct. 02, 2015 USD ($)	May 31, 2015 USD ($) installment
Long term notes receivable and available for sale securities [Line Items]
Available-for-sale securities:			$ 92,400,000	$ 93,000,000
NYPC loan
Long term notes receivable and available for sale securities [Line Items]
Accounts receivable from CPTC, includes unbilled accounts receivable			15,300,000
MPTC loans (2)
Long term notes receivable and available for sale securities [Line Items]
Accounts receivable from CPTC, includes unbilled accounts receivable			6,300,000	28,600,000
CPTC loans
Long term notes receivable and available for sale securities [Line Items]
Accounts receivable from CPTC, includes unbilled accounts receivable			30,900,000	25,200,000
CPTC loan facility, Varian's maximum loan commitment			$ 9,700,000
CPTC loan facility, minimum interest rate (as a percent)			9.00%
CPTC loan facility, amortization period over which monthly payments are calculated after January 1, 2015 (in years)			15 years
CPTC loans | Tranche A loan
Long term notes receivable and available for sale securities [Line Items]
Available-for-sale securities:			$ 78,700,000	73,500,000
CPTC loans | Tranche B loan
Long term notes receivable and available for sale securities [Line Items]
Available-for-sale securities:			11,100,000	10,400,000
CPTC loans | Tranche C Loans
Long term notes receivable and available for sale securities [Line Items]
Available-for-sale securities:			$ 2,600,000
CPTC loans | London Interbank Offered Rate (LIBOR)
Long term notes receivable and available for sale securities [Line Items]
CPTC loan facility, interest rate margin (as a percent)			7.00%
Varian Medical Systems, Inc. | CPTC loans
Long term notes receivable and available for sale securities [Line Items]
CPTC loan facility, Varian's maximum loan commitment			$ 4,400,000
Loans Receivable
Long term notes receivable and available for sale securities [Line Items]
Long-term			47,800,000	30,900,000
Loans Receivable | NYPC loan
Long term notes receivable and available for sale securities [Line Items]
Maximum lending commitment	$ 91,500,000
Long-term			$ 18,500,000	18,700,000
Loans Receivable | MPTC loans (2)
Long term notes receivable and available for sale securities [Line Items]
Maximum lending commitment					$ 35,000,000
Interest rate (as a percent)			12.00%
Long-term			$ 29,300,000	$ 12,200,000
Number of annual payments | installment					3
Number of installments | installment			2
Installment payment amount			$ 11,400,000
Loans Receivable | Reclassification From Long-Term Notes Receivable | MPTC loans (2)
Long term notes receivable and available for sale securities [Line Items]
Interest rate (as a percent)			15.00%
Long-term			$ 17,000,000
Senior First Lien Loan | NYPC loan
Long term notes receivable and available for sale securities [Line Items]
Maximum lending commitment	$ 73,000,000
Financing Receivable, Aggregate Principal Amount Funded		$ 10,500,000
Term (in years)	6 years
Interest rate (as a percent)	9.00%
Senior First Lien Loan | Deutsche Bank
Long term notes receivable and available for sale securities [Line Items]
Proceeds from assignment		$ 8,300,000
Discount		3.00%
Senior Subordinated Loans | NYPC loan
Long term notes receivable and available for sale securities [Line Items]
Maximum lending commitment	$ 18,500,000
Term (in years)	6 years 6 months
Interest rate (as a percent)	13.50%
Roll Over Loan | MPTC loans (2)
Long term notes receivable and available for sale securities [Line Items]
Notes receivable					$ 10,000,000.0
Accrued interest					$ 2,200,000
Selling, General and Administrative Expenses | Senior First Lien Loan | Deutsche Bank
Long term notes receivable and available for sale securities [Line Items]
Gain/loss on sale		$ (2,200,000)