|
Segment Information Depreciation and Amortization, by Segment (Details) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Sep. 30, 2014
|
Sep. 30, 2013
|
Sep. 30, 2014
|
Sep. 30, 2013
|
|
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation and amortization | $ 24,627 | $ 24,718 | $ 75,233 | $ 73,749 |
|
Electricity Operating Segment [Member]
|
||||
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation and amortization | 11,596 | 11,740 | 36,754 | 35,084 |
|
Gas Operating Segment [Member]
|
||||
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation and amortization | 6,486 | 6,736 | 19,590 | 20,211 |
|
Water Operating Segment [Member]
|
||||
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation and amortization | 6,466 | 6,201 | 18,679 | 18,379 |
|
Corporate Unallocated [Member]
|
||||
| Property, Plant and Equipment [Line Items] | ||||
| Depreciation and amortization | $ 79 | $ 41 | $ 210 | $ 75 |