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RECENT ACCOUNTING PRONOUNCEMENTS NEW ACCOUNTING PRONOUNCEMENTS (Narrative) (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Jan. 01, 2019 | Mar. 31, 2018
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New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease assets |  | $ 11,599 |  |
Finance lease assets |  | 1,584 |  |
Operating lease liabilities |  | 11,615 |  |
ASU 2016-02 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Operating lease assets |  |  | $ 12,100 |
Finance lease assets |  |  | 12,100 |
Operating lease liabilities |  |  | $ 12,300 |
Cumulative effect adjustment | [1] | 254 |  |
ASU 2016-02 | Retained Earnings |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect adjustment | [1] | $ 254 |  |
ASU 2016-01 | Retained Earnings |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cumulative effect adjustment | [2] |  |  | $ 198
[1] | (3) Effective January 1, 2019, the Company adopted ASU 2016-02, Leases, on a modified-retrospective basis. Refer to Note 2 for further details.
[2] | (1)Effective January 1, 2018, the Company adopted ASU 2016-01, Income Statement - Financial Instruments. As a result of the adoption, the Company reclassified its unrealized gain on equity investments from accumulated other comprehensive loss to retained earnings.

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