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DESCRIPTION OF BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Recently Adopted Accounting Standards (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Retained earnings | $ 147,807 | $ 168,695
ASU 2016-09 [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Cumulative effect adjustment | 0 |
ASU 2016-09 [Member] | Retained Earnings [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Cumulative effect adjustment | 1,696 |
ASU 2016-09 [Member] | Additional Paid-in Capital [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Cumulative effect adjustment | (1,696) |
ASU 2016-09 [Member] | Adjustments Due to ASC 606 [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Retained earnings | $ 3,400 |
ASU 2016-02 [Member] | Plan [Member] | Minimum [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Right-of-use assets |  | 18,000
Lease liabilities |  | 18,000
ASU 2016-02 [Member] | Plan [Member] | Maximum [Member] |  |
Summary of Adjustments to Conform to New Guidance [Abstract] |  |
Right-of-use assets |  | 22,000
Lease liabilities |  | $ 22,000

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