Fair Value Measurements (Fair Value of Assets and Liabilities Measured on Recurring Basis) (Details) - Recurring Basis - USD ($) $ in Thousands |
Mar. 31, 2019 |
Dec. 31, 2018 |
|---|---|---|
| Assets | ||
| Derivative financial instruments | $ 11,757 | $ 65,114 |
| Liabilities | ||
| Derivative financial instruments | (31,533) | (17,920) |
| Net Derivative Fair Value | (19,776) | 47,194 |
| Level 1 | ||
| Assets | ||
| Derivative financial instruments | 0 | 0 |
| Liabilities | ||
| Derivative financial instruments | 0 | 0 |
| Net Derivative Fair Value | 0 | 0 |
| Level 2 | ||
| Assets | ||
| Derivative financial instruments | 11,757 | 65,114 |
| Liabilities | ||
| Derivative financial instruments | (31,533) | (17,920) |
| Net Derivative Fair Value | (19,776) | 47,194 |
| Level 3 | ||
| Assets | ||
| Derivative financial instruments | 0 | 0 |
| Liabilities | ||
| Derivative financial instruments | 0 | 0 |
| Net Derivative Fair Value | $ 0 | $ 0 |
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|