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Derivative Financial Instruments and Hedging Activities (Notes) | 12 Months Ended
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Dec. 31, 2017
Derivative Financial Instruments and Hedging Activities [Abstract] |
Derivative Instruments and Hedging Activities Disclosure [Text Block] | 10. Derivative Financial Instruments and Hedging Activities Risk Management Objective of Using Derivatives. We are exposed to certain risks arising from both our business operations and economic conditions. We principally manage our exposures to a wide variety of business and operational risks through management of our core business activities. We manage economic risks, including interest rate, liquidity, and credit risk, primarily by managing the amount, sources, and duration of our debt funding and the use of derivative financial instruments. Specifically, we may enter into derivative financial instruments to manage exposures arising from business activities resulting in differences in the amount, timing, and duration of our known or expected cash payments principally related to our borrowings. See Note 2, "Summary of Significant Accounting Policies and Recent Accounting Pronouncements" for a further discussion of derivative financial instruments. Cash Flow Hedges of Interest Rate Risk. Our objectives in using interest rate derivatives are to add stability to interest expense and to manage our exposure to interest rate movements. To accomplish these objectives, we primarily use interest rate swaps and caps as part of our interest rate risk management strategy. Interest rate swaps involve the receipt of variable rate amounts from a counterparty in exchange for us making fixed-rate payments over the life of the agreements without exchange of the underlying notional amount. Interest rate caps involve the receipt of variable rate amounts from a counterparty if interest rates rise above the strike rate on the contract in exchange for an upfront premium. Designated Hedges. Effective with our adoption of ASU 2017-12, the gain or loss on the derivatives designated and qualifying as cash flow hedges is reported as a component of other comprehensive income or loss and subsequently reclassified into earnings in the period the hedged forecasted transaction affects earnings and presented in the same line item as the earnings effect of the hedged item. At December 31, 2017, we had a total of three designated hedges outstanding with a total notional value of $200.0 million. In August 2017, we entered into a forward interest rate swap agreement with a notional amount of $100.0 million that becomes effective October 31, 2018 to hedge a portion of an anticipated future fixed rate debt issuance. In November 2017, we entered into two forward interest swap agreements with a notional amount of $50.0 million each and both become effective October 31, 2018 to hedge a portion of anticipated future fixed rate debt issuances. As of December 31, 2017, the amount expected to be reclassified into earnings in the next 12 months as a decrease to interest expense is immaterial. See Note 13, "Fair Value Measurements" for a further discussion of the fair value of our derivative financial instrument. Non-Designated Hedges. Derivatives are not entered into for trading or speculative purposes and are used to manage our exposure to interest rate movements and other identified risks. Our non-designated hedges are either specifically non-designated by management or do not meet strict hedge accounting requirements. Changes in the fair value of derivatives not designated in hedging relationships are recorded directly in earnings in interest and other income. At December 31, 2017, we did not have any non-designated hedges outstanding. At December 31, 2016, we had one outstanding interest rate cap with a notional amount of $175.0 million which was not designated as a hedge of interest rate risk. The fair value changes for this derivative was not material. The table below presents the fair value of our derivative financial instruments as well as their classification in the consolidated balance sheets at December 31, 2017:
| Asset Derivatives |  | Liability Derivatives
(in millions) | Balance Sheet Location |  | Fair Value |  | Balance Sheet Location |  | Fair Value
Derivatives designated as hedging instruments |  |  |  |  |  |  |
Interest Rate Swaps | Other Assets |  | $ | 2.2 |  |  | Other Liabilities |  | $ | 0.5 |
The table below presents the effect of our derivative financial instruments in the consolidated statements of income (loss) and comprehensive income for the year ended December 31, 2017:
Derivatives in Cash Flow Hedging Relationships |  | Unrealized Gain Recognized in Other Comprehensive Income (“OCI”) on Derivatives |  | Location of Gain Reclassified from Accumulated OCI into Income |  | Amount of Gain Reclassified from Accumulated OCI into Income
| 2017 |  |  |  | 2017
Interest Rate Swaps |  | $ | 1.7 |  |  | Interest expense |  | N/A
Credit-Risk-Related Contingent Features. Derivative financial investments expose us to credit risk in the event of non-performance by the counterparties under the terms of the interest rate hedge agreements. The Company has agreements with derivative counterparties that contain provisions where the Company could be declared in default on its derivative obligations if repayment of the underlying indebtedness is accelerated by the lender due to the Company's default on the indebtedness. As of December 31, 2017, the fair value of derivatives in a net liability position, which excludes any adjustment for nonperformance risk, related to these agreements was approximately $0.5 million.

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- Definition Derivative Financial Instruments and Hedging Activities [Abstract] + References No definition available. + Details
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- Definition The entire disclosure for derivative instruments and hedging activities including, but not limited to, risk management strategies, non-hedging derivative instruments, assets, liabilities, revenue and expenses, and methodologies and assumptions used in determining the amounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -URI http://asc.fasb.org/topic&trid=2229140 + Details
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