v3.19.1

CONTINGENCIES AND COMMITMENTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Commitments And Contingencies Disclosure Abstract
Letter of credit requirement	$ 5,862	$ 5,862
OtherCommitmentsLineItems
RestrictedCash	69,365	0
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents			$ 34,770
Total Proceeds	70,200
Cash and Cash Equivalents Member
OtherCommitmentsLineItems
Cash	122,893	68,266
RestrictedCash	69,365	0
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	$ 192,258	$ 68,266

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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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