SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, Summary of Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Assets
Cash equivalents	$ 257,420	$ 247,951
Trading securities	6,375	20,209
Total assets	263,795	268,160
Liabilities
Short-term borrowings	53,976	56,004
Long-term borrowings	19,138	21,009
Total liabilities	73,114	77,013
Fair Value, Inputs, Level 1
Assets
Cash equivalents	257,420	247,951
Trading securities	6,375	20,209
Total assets	263,795	268,160
Liabilities
Short-term borrowings	0	0
Long-term borrowings	0	0
Total liabilities	0	0
Fair Value, Inputs, Level 2
Assets
Cash equivalents		0
Trading securities		0
Total assets	0	0
Liabilities
Short-term borrowings	53,976	56,004
Long-term borrowings	19,138	21,009
Total liabilities	73,114	77,013
Fair Value, Inputs, Level 3
Assets
Cash equivalents	0	0
Trading securities	0	0
Total assets	0	0
Liabilities
Short-term borrowings	0	0
Long-term borrowings	0	0
Total liabilities	$ 0	$ 0