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SEGMENTS OF BUSINESS - Key Metrics Reviewed (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
SEGMENTS OF BUSINESS |  |  |  |
Fuel | $ (15,063) | $ (12,370) | $ (30,273) | $ (20,929)
Other Operating and Maintenance Costs | (28,955) | (33,981) | (57,344) | (70,963)
Cost of Purchased Power | (2,172) | (2,619) | (9,012) | (4,545)
Utilities | (4,507) | (3,910) | (8,659) | (8,504)
Labor | (26,799) | (26,555) | (53,828) | (61,723)
Delivered Energy |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 44,132 | 43,106 | 116,268 | 92,234
Capacity Revenue |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 15,844 | 16,873 | 29,651 | 28,646
Electric sales |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 59,976 | 59,979 | 145,919 | 120,880
EBITDA Margin | 22,316 | 24,221 | 71,876 | 61,730
Coal Sales |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 38,147 | 32,801 | 68,332 | 82,431
EBITDA Margin | (4,733) | (15,686) | (23,633) | (33,297)
Electric Operations |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 59,976 | 59,979 | 145,919 | 120,880
Electric Operations | Delivered Energy |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 44,132 | 43,106 | 116,268 | 92,234
Electric Operations | Capacity Revenue |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 15,844 | 16,873 | 29,651 | 28,646
Electric Operations | Operating Segment |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Fuel | (21,328) | (24,416) | (59,399) | (49,351)
Other Operating Costs | (1) | 7 | (9) | 14
Total Variable Costs | (21,329) | (24,409) | (59,408) | (49,337)
Other Operating and Maintenance Costs | (10,707) | (12,479) | (15,234) | (17,365)
Cost of Purchased Power | (2,172) | (2,619) | (9,012) | (4,545)
Utilities | (1,383) | (437) | (2,059) | (959)
Labor | (7,639) | (7,160) | (15,782) | (14,843)
Margin Without General And Administrative | 16,746 | 12,875 | 44,424 | 33,831
General and administrative | (1,129) | (1,450) | (2,664) | (2,508)
EBITDA Margin | 15,617 | 11,425 | 41,760 | 31,323
Electric Operations | Operating Segment | Delivered Energy |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 44,132 | 43,106 | 116,268 | 92,234
Electric Operations | Operating Segment | Capacity Revenue |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 15,844 | 16,873 | 29,651 | 28,646
Electric Operations | Operating Segment | Electric sales |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 59,976 | 59,979 | 145,919 | 120,880
EBITDA Margin | 15,617 | 11,425 | 41,760 | 31,323
Coal Operations |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 38,147 | 32,801 | 68,332 | 82,431
Coal Operations | Operating Segment |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Fuel | (434) | (750) | (990) | (1,985)
Other Operating and Maintenance Costs | (18,247) | (21,597) | (42,101) | (53,388)
Utilities | (3,124) | (3,253) | (6,600) | (7,545)
Labor | (19,160) | (19,395) | (38,046) | (46,880)
Margin Without General And Administrative | 4,564 | 715 | 12,566 | 1,948
General and administrative | (1,915) | (3,492) | (4,228) | (5,930)
EBITDA Margin | 2,649 | (2,777) | 8,338 | (3,982)
Coal Operations | Operating Segment | Coal Sales |  |  |  |
SEGMENTS OF BUSINESS |  |  |  |
Revenues | 45,529 | 45,710 | 100,303 | 111,746
EBITDA Margin | $ 2,649 | $ (2,777) | $ 8,338 | $ (3,982)

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