FUNDING AGREEMENTS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Funding Agreements
Site-funded ATM liability	$ 134,100,000		$ 134,100,000		$ 151,000,000
Contract Cash Solutions Agreement | Indemnification Guarantee | Cash
Funding Agreements
Outstanding balance	226,600,000		226,600,000		285,400,000
Contract Cash Solutions Agreement | Indemnification Guarantee | Cash | Interest expense
Funding Agreements
Cash usage fees incurred	1,200,000	$ 700,000	3,500,000	$ 2,300,000
Contract Cash Solutions Agreement, as amended | Indemnification Guarantee | Cash
Funding Agreements
Maximum amount	425,000,000		$ 425,000,000
Expiration date			Jun. 30, 2019
Prefunded Cash Access Agreements | Prepaid expenses and other assets
Funding Agreements
Prefunded cash	$ 9,300,000		$ 9,300,000		$ 8,500,000