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DEBT (Schedule of Debt) (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020
Long-term debt |  |
Carrying value of long-term debt | $ 717,855 | $ 715,567
Less current portion | 766 | 111
Long-term debt, less current portion (Note 9) | 717,089 | 715,456
Short-term debt |  |
Amounts due banks | 51,964 | 2,623
Current portion of long-term debt (Note 9) | 766 | 111
Total short-term debt | 52,730 | 2,734
Total debt | $ 769,819 | $ 718,190
Short-term Debt, Weighted Average Interest Rate, at Point in Time | 1.80% | 17.90%
Weighted Average [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Term | 12 years 4 months 24 days |
Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt, Weighted Average Interest Rate | 3.30% |
Debt Issuance Cost | $ 1,074 | $ 1,178
Long-term debt |  |
Carrying value of long-term debt | 704,313 | 704,886
Other borrowings due through 2023, interest up to 2.0% |  |
Long-term debt |  |
Carrying value of long-term debt | 13,542 | $ 10,681
us-gaap_OtherLinesOfCredit [Member] |  |
Debt Instrument [Line Items] |  |
Borrowing capacity under the line of credit | 91,309 |
Short-term debt |  |
Line of Credit, Current | $ 11,964 |
Minimum | Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.80% |
Maximum | Senior Notes [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 4.00% |
Maximum | Other borrowings due through 2023, interest up to 2.0% |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate, Stated Percentage | 2.20% | 2.20%
Senior Notes Series A [Member] | Senior Notes 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Aug. 20, 2025 |
Debt Instrument, Interest Rate, Stated Percentage | 3.15% |
Senior Notes Series A [Member] | Senior Notes 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Oct. 20, 2028 |
Debt Instrument, Interest Rate, Stated Percentage | 2.75% |
Senior Notes Series B [Member] | Senior Notes 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Aug. 20, 2030 |
Debt Instrument, Interest Rate, Stated Percentage | 3.35% |
Senior Notes Series B [Member] | Senior Notes 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Oct. 20, 2033 |
Debt Instrument, Interest Rate, Stated Percentage | 3.03% |
Senior Notes Series C [Member] | Senior Notes 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 50,000 |
Debt Instrument, Maturity Date | Apr. 01, 2035 |
Debt Instrument, Interest Rate, Stated Percentage | 3.61% |
Senior Notes Series C [Member] | Senior Notes 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Oct. 20, 2037 |
Debt Instrument, Interest Rate, Stated Percentage | 3.27% |
Senior Notes Series D [Member] | Senior Notes 2015 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 100,000 |
Debt Instrument, Maturity Date | Apr. 01, 2045 |
Debt Instrument, Interest Rate, Stated Percentage | 4.02% |
Senior Notes Series D [Member] | Senior Notes 2016 [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Face Amount | $ 50,000 |
Debt Instrument, Maturity Date | Oct. 20, 2041 |
Debt Instrument, Interest Rate, Stated Percentage | 3.52% |

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