Information Relating to Segment Statement of Income (Details) (USD $)
|
3 Months Ended | 6 Months Ended | ||||||
---|---|---|---|---|---|---|---|---|
Jun. 30, 2014
|
Jun. 30, 2013
|
Jun. 30, 2014
|
Jun. 30, 2013
|
|||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | $ 283,237,000 | $ 279,826,000 | $ 743,406,000 | $ 660,497,000 | ||||
Net Income (Loss) | 19,820,000 | 30,518,000 | 67,938,000 | 73,715,000 | ||||
Mark-to-market gain (loss) on certain interest rate swaps, net of tax | 12,000,000 | 17,000,000 | ||||||
Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | (32,925,000) | (30,299,000) | (66,891,000) | (61,357,000) | ||||
Net Income (Loss) | 0 | (3,000) | 0 | 0 | ||||
Corporate activities[Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 0 | 0 | 0 | 0 | ||||
Net Income (Loss) | (1,151,000) | 11,679,000 | [1] | (821,000) | 17,378,000 | [1] | ||
Consolidation, Eliminations [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 0 | 0 | 0 | 0 | ||||
Electric Utilities [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 158,740,000 | 154,338,000 | 336,835,000 | 312,821,000 | ||||
Net Income (Loss) | 11,427,000 | 10,610,000 | 26,002,000 | 22,966,000 | ||||
Electric Utilities [Member] | Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 3,144,000 | 3,694,000 | 7,151,000 | 7,841,000 | ||||
Gas Utilities [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 102,499,000 | 105,836,000 | 361,836,000 | 305,648,000 | ||||
Net Income (Loss) | 1,994,000 | 3,192,000 | 26,692,000 | 21,675,000 | ||||
Gas Utilities [Member] | Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 0 | 0 | 0 | 0 | ||||
Power Generation [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 1,267,000 | 1,031,000 | 2,536,000 | 2,053,000 | ||||
Net Income (Loss) | 7,194,000 | 5,031,000 | 15,267,000 | 10,675,000 | ||||
Power Generation [Member] | Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 20,713,000 | 19,094,000 | 41,792,000 | 38,432,000 | ||||
Coal Mining [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 5,583,000 | 6,807,000 | 12,201,000 | 12,817,000 | ||||
Net Income (Loss) | 2,016,000 | 1,973,000 | 4,480,000 | 3,038,000 | ||||
Coal Mining [Member] | Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 9,068,000 | 7,511,000 | 17,948,000 | 15,084,000 | ||||
Oil and Gas [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | 15,148,000 | 11,814,000 | 29,998,000 | 27,158,000 | ||||
Net Income (Loss) | (1,660,000) | (1,964,000) | (3,682,000) | (2,017,000) | ||||
Oil and Gas [Member] | Intersegment Elimination [Member]
|
||||||||
Segment Reporting Information [Line Items] | ||||||||
Revenue, Net | $ 0 | $ 0 | $ 0 | $ 0 | ||||
|