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Fair Value of Financial Instruments (Schedule of Valuation Techniques and Significant Observable Inputs) (Details) | 6 Months Ended | 12 Months Ended
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Dec. 31, 2017 | Jun. 30, 2017
Fair Value Disclosures [Abstract] |  |
Weighted average cost of capital | 15.40% | 14.20%
Adjusted EBITDA growth rate | 17.90% | 17.00%

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- Definition Fair Value Inputs, Adjusted Earning before Interest, Taxes, Depreciation, and Amortization Growth Rate + References No definition available. + Details
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- Definition Interest rate used to find the present value of an amount to be paid or received in the future as an input to measure fair value. For example, but not limited to, weighted average cost of capital (WACC), cost of capital, cost of equity and cost of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (bbb) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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