Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Details)

 v2.3.0.11
Segment Information (Details) (USD $)
In Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Jun. 30, 2011
Jun. 30, 2010
Electric Power [Member]
       
Summarized financial information        
Revenues from external customers $ 667,082 $ 463,350 $ 1,233,543 $ 920,171
Operating income (loss) 70,082 50,389 101,400 90,206
Depreciation 12,172 10,068 24,606 19,969
Natural Gas and Pipeline [Member]
       
Summarized financial information        
Revenues from external customers 209,658 263,120 386,481 452,054
Operating income (loss) (1,190) 25,896 (38,183) 44,270
Depreciation 10,813 11,322 20,688 22,498
Telecommunications [Member]
       
Summarized financial information        
Revenues from external customers 106,422 117,662 185,815 195,888
Operating income (loss) 9,039 7,694 5,427 6,894
Depreciation 1,488 1,758 2,886 3,464
Fiber Optic Licensing [Member]
       
Summarized financial information        
Revenues from external customers 27,752 26,370 54,034 50,672
Operating income (loss) 13,182 13,880 25,217 25,999
Depreciation 3,435 3,131 6,853 6,169
Corporate and non-allocated costs [Member]
       
Summarized financial information        
Operating income (loss) (33,383) (33,034) (63,047) (60,254)
Depreciation 1,260 1,012 2,331 1,775
Consolidated [Member]
       
Summarized financial information        
Revenues from external customers 1,010,914 870,502 1,859,873 1,618,785
Operating income (loss) 57,730 64,825 30,814 107,115
Depreciation $ 29,168 $ 27,291 $ 57,364 $ 53,875