|
Derivative Instruments and Hedging Activities (Derivatives Fair Value By Balance Sheet Location) (Details) (USD $)
In Thousands, unless otherwise specified |
Mar. 31, 2014
|
Dec. 31, 2013
|
|---|---|---|
| Derivative [Line Items] | ||
| Asset Fair Value | $ 60 | |
| Liability Fair Value | (2,686) | (1,108) |
| Net Derivative Fair Value | (1,048) | |
|
Not Designated as Hedging Instrument [Member]
|
||
| Derivative [Line Items] | ||
| Asset Fair Value | 60 | |
| Liability Fair Value | (2,686) | (1,108) |
| Net Derivative Fair Value | (2,686) | (1,048) |
|
Current liabilities - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas [Member]
|
||
| Derivative [Line Items] | ||
| Asset Fair Value | 60 | |
| Liability Fair Value | (160) | |
| Net Derivative Fair Value | (160) | 60 |
|
Non-current liabilities - Other long-term liabilities [Member] | Not Designated as Hedging Instrument [Member] | Natural Gas [Member]
|
||
| Derivative [Line Items] | ||
| Liability Fair Value | (41) | (72) |
| Net Derivative Fair Value | (41) | (72) |
|
Current assets - Fair market value of derivatives [Member] | Not Designated as Hedging Instrument [Member] | Crude Oil [Member]
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| Derivative [Line Items] | ||
| Liability Fair Value | (2,485) | (1,036) |
| Net Derivative Fair Value | $ (2,485) | $ (1,036) |