NONCONSOLIDATED VARIABLE INTEREST ENTITIES (Details) - Variable Interest Entity, Not Primary Beneficiary $ in Thousands	Dec. 31, 2016 USD ($) railcar	Dec. 31, 2015 USD ($)
Variable Interest Entity [Line Items]
Total assets	$ 7	$ 196
Total liabilities	1,564	2,829
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	$ 7	196
Total liabilities	0	0
Maximum exposure to loss	0	0
Accounts payable
Variable Interest Entity [Line Items]
Total assets	0
Total liabilities	3
Maximum exposure to loss	0
Deferred revenue, current portion
Variable Interest Entity [Line Items]
Total assets	0	0
Total liabilities	1,297	1,287
Maximum exposure to loss	0	0
Deferred revenue, net of current portion
Variable Interest Entity [Line Items]
Total assets	0	0
Total liabilities	264	1,542
Maximum exposure to loss	$ 0	$ 0