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Financial Statement Presentation - Narrative (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Debt issuance costs | $ (8,861,000) | $ (8,151,000)
Accounting Standards Update 2015-03 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Change in income statement | 0 |
Change in cash flow | 0 |
Accounting Standards Update 2015-03 | Long-term Debt |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Debt issuance costs | (8,900,000) |
Accounting Standards Update 2015-03 | Other Assets |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Debt issuance costs | $ 8,900,000 |

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