SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Leases (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
Jan. 01, 2019 |
---|---|---|---|
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
Operating lease ROU liabilities | $ 9,143 | $ 9,688 | |
Operating lease ROU assets | $ 8,686 | $ 9,222 | |
ASU 2016-02 | |||
New Accounting Pronouncements or Change in Accounting Principle [Line Items] | |||
Operating lease ROU liabilities | $ 10,500 | ||
Operating lease ROU assets | $ 7,500 |