| Fair Value Measurements (Tables) | 3 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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| Mar. 31, 2019 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Open Derivative Financial Instruments | The following table presents the fair value of our open derivative financial instruments (in thousands): 
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| Schedule of Carrying Value and Fair Value of Long-Term Debt | The following table presents the carrying value and fair value of our long-term debt (in thousands): 
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- Definition Tabular disclosure of the fair value of financial instruments, including financial assets and financial liabilities, and the measurements of those instruments, assets, and liabilities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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- References No definition available. 
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- Definition Tabular disclosure of derivative assets at fair value. No definition available. 
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