|
Consolidated Statements of Cash Flows (Parenthetical) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |
|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Statement Of Cash Flows [Abstract] | ||
| Advances and contributions for construction, refunds | $ 4,146 | $ 5,277 |