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Summary of Significant Accounting Policies | 9 Months Ended
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Sep. 30, 2017
Accounting Policies [Abstract] |
Summary of Significant Accounting Policies | Summary of Significant Accounting Policies Our significant accounting policies are consistent with those disclosed in Note 2 to our audited financial statements included in our IPO Prospectus. Cash and Cash Equivalents and Restricted Cash The following table provides a reconciliation of cash and cash equivalents and restricted cash reported within the Condensed Balance Sheets that sum to the total of the same such amounts shown in the Condensed Statements of Cash Flows (in thousands):
| Successor
| September 30, 2017 |  | December 31, 2016
Cash and cash equivalents | $ | 234,053 |  |  | $ | 150,045 |
Restricted cash included in other long-term assets | 1,354 |  |  | 2,611 |
Total cash and cash equivalents and restricted cash included in the Statements of Cash Flows | $ | 235,407 |  |  | $ | 152,656 |
Cash and cash equivalents include short-term deposits and highly liquid investments that have original maturities of three months or less when purchased and are stated at cost, which approximates fair value. As of September 30, 2017 (Successor) and December 31, 2016 (Successor), restricted cash included in other long-term assets in the Condensed Balance Sheet represents amounts funded to an escrow account as collateral for coal royalties due under certain underground coal mining lease contracts. Short-Term Investments Instruments with maturities greater than three months, but less than twelve months, are included in short-term investments. The Company purchases United States Treasury bills with maturities ranging from six to twelve months which are classified as held to maturity and are carried at amortized cost, which approximates fair value. Securities classified as held to maturity securities are those securities that management has the intent and ability to hold to maturity. As of September 30, 2017 (Successor) and December 31, 2016 (Successor), the Company’s short-term investments consisted of $17.5 million in Treasury bills with a maturity of six months. These Treasury bills were posted as collateral for the self-insured black lung related claims asserted by or on behalf of former employees of Walter Energy and its subsidiaries, which were assumed in the Asset Acquisition and relate to periods prior to March 31, 2016. New Accounting Pronouncements In September 2015, the FASB issued Accounting Standards Update ("ASU") 2015-16, “Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments,” which eliminates the requirement that an acquirer in a business combination account for measurement-period adjustments retrospectively. Instead, an acquirer will recognize a measurement-period adjustment during the period in which it determines the amount of the adjustment. The guidance is effective for public business entities for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years. We adopted the amendments of ASU 2015-16, effective January 1, 2017. We recognized a $3.5 million measurement-period adjustment during the three months ended March 31, 2017 (Successor), which we reflected prospectively (see Note 3). In May 2014, the FASB issued ASU 2014-09 “Revenue from Contracts with Customers”. The new standard requires an entity to recognize revenue upon transfer of promised goods or services to customers in an amount that reflects the consideration to which the company expects to be entitled in exchange for those goods or services. The guidance also requires additional disclosures about the nature, amount, timing, and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. In August 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers (Topic 606): Deferral of the Effective Date,” which defers the effective date of ASU 2014-09 by one year. ASU 2015-09 is effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period and permits early adoption on a limited basis. The Company plans to adopt ASU 2014-09 as of January 1, 2018, using the modified retrospective approach. Based on the current status of the Company’s assessment of the new standard, the Company does not anticipate any significant changes to the current timing or method for recognizing revenue. Additionally, the Company does not anticipate the new standard to have a material impact on our financial statements outside of the expanded disclosure requirements.

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