NONCONSOLIDATED VARIABLE INTEREST ENTITIES (Details) - Variable Interest Entity, Not Primary Beneficiary $ in Thousands	Sep. 30, 2017 USD ($) railcar	Dec. 31, 2016 USD ($)
Variable Interest Entity [Line Items]
Total assets	$ 20	$ 7
Total liabilities	603	1,564
Maximum exposure to loss	$ 0	0
Number of railcars with payment and performance obligations | railcar	2,613
Accounts receivable
Variable Interest Entity [Line Items]
Total assets	$ 20	7
Total liabilities	0	0
Maximum exposure to loss	0	0
Accounts payable
Variable Interest Entity [Line Items]
Total assets	0	0
Total liabilities	0	3
Maximum exposure to loss	0	0
Deferred revenue, current portion
Variable Interest Entity [Line Items]
Total assets	0	0
Total liabilities	603	1,297
Maximum exposure to loss	0	0
Deferred revenue, net of current portion
Variable Interest Entity [Line Items]
Total assets	0	0
Total liabilities	0	264
Maximum exposure to loss	$ 0	$ 0