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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - AOCI (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accumulated other comprehensive income (loss) |  |  |
Beginning Balance | $ 601,250 |  |
Unrecognized actuarial (loss) gain, net of tax | 2,428 | $ 5,014 | $ (2,412)
Pension settlement, net of tax | 915 |  |
Foreign currency translation adjustment | (1,385) | (689) | 37
Interest rate swap | (21) | 170 | (101)
Reclassification of foreign currency losses (gains) on assets sold and held for sale, net of tax expense of $0.2 million, $0 and $0 | (500) |  | 6,036
Ending Balance | 580,813 | 601,250 |
Projected pension benefit obligation, tax expense (benefit) | (200) | (100) | 100
Reclassification of loss on pension settlement, net of tax | (800) |  |
Reclassification of foreign currency losses, net of tax expense | 200 | 0 | 0
Accumulated Other Comprehensive Income/(Loss) |  |  |
Accumulated other comprehensive income (loss) |  |  |
Beginning Balance | 4,773 | 278 | (3,282)
Unrecognized actuarial (loss) gain, net of tax | 2,428 | 5,014 | (2,412)
Pension settlement, net of tax | 915 |  |
Foreign currency translation adjustment | (1,385) | (689) | 37
Interest rate swap | (21) | 170 | (101)
Reclassification of foreign currency losses (gains) on assets sold and held for sale, net of tax expense of $0.2 million, $0 and $0 | (500) |  | 6,036
Ending Balance | 6,210 | 4,773 | 278
Projected Pension and Postretirement Benefit Obligations |  |  |
Accumulated other comprehensive income (loss) |  |  |
Beginning Balance | 4,444 | (570) | 1,842
Unrecognized actuarial (loss) gain, net of tax | 2,428 | 5,014 | (2,412)
Pension settlement, net of tax | 915 |  |
Ending Balance | 7,787 | 4,444 | (570)
Translation Adjustment |  |  |
Accumulated other comprehensive income (loss) |  |  |
Beginning Balance | 308 | 997 | (5,076)
Foreign currency translation adjustment | (1,385) | (689) | 37
Reclassification of foreign currency losses (gains) on assets sold and held for sale, net of tax expense of $0.2 million, $0 and $0 | (500) |  | 6,036
Ending Balance | (1,577) | 308 | 997
Other |  |  |
Accumulated other comprehensive income (loss) |  |  |
Beginning Balance | 21 | (149) | (48)
Interest rate swap | $ (21) | 170 | (101)
Ending Balance |  | $ 21 | $ (149)

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