VARIABLE INTEREST ENTITIES - Narrative (Details) $ in Thousands	6 Months Ended
Sep. 30, 2018 USD ($) joint_venture	Mar. 31, 2018 USD ($)	Sep. 30, 2017 USD ($)
Variable Interest Entity [Line Items]
Investment in joint ventures	$ 62,838	$ 68,151	$ 52,606
Advances to joint ventures	3,587	8,188	5,325
Variable Interest Entity, Not Primary Beneficiary
Variable Interest Entity [Line Items]
Investment in joint ventures	57,251	64,208	51,825
Advances to joint ventures	$ 994	5,895	5,325
Number of joint ventures, maximum loss exposure \| joint_venture	2
Joint ventures, maximum loss exposure	$ 73,696	$ 65,487	$ 75,625

Number of Joint Ventures, Maximum Loss Exposure

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Amount of investment in equity method investee and investment in and advance to affiliate.

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The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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