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Fair Value Disclosure of Financial Instruments (Tables) | 12 Months Ended
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Dec. 31, 2015 | Dec. 31, 2014
Notes To Financial Statements [Abstract] |  |
Assets and Liabilities Measured at Fair Value on a Recurring Basis | The table below presents our assets and liabilities measured at fair value on a recurring basis as of December 31, 2015 and December 31, 2014, aggregated by the level in the fair value hierarchy within which those measurements fall. Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2015 (dollars in thousands)
| Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance at December 31, 2015
Assets |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 6 |  |  | $ | — |  |  | $ | 6 |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 10,358 |  |  | $ | — |  |  | $ | 10,358 |
| Assets and Liabilities Measured at Fair Value on a Recurring Basis at December 31, 2014 (dollars in thousands)
| Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Balance at December 31, 2014
Assets |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 78 |  |  | $ | — |  |  | $ | 78 |
Liabilities |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments | $ | — |  |  | $ | 13,392 |  |  | $ | — |  |  | $ | 13,392 |

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- Definition Notes to Financial Statements [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19190-110258 + Details
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