Summary of Significant Accounting Policies | Summary of Significant Accounting Policies The following accounting policies significantly affect the preparation of our Consolidated Financial Statements: Use of Estimates . In preparing our Consolidated Financial Statements in conformity with U.S. generally accepted accounting principles, management is required to make certain assumptions and estimates that affect reported amounts of assets, liabilities, revenues, expenses and the disclosure of contingencies. In making these assumptions and estimates, management may from time to time seek advice and consider information provided by actuaries and other experts in a particular area. Actual amounts could differ materially from these estimates. Consolidation Policy . Our Consolidated Financial Statements include the financial statements of Denny’s Corporation and its wholly-owned subsidiaries: Denny’s, Inc., DFO, LLC and Denny's Realty, LLC. All significant intercompany balances and transactions have been eliminated in consolidation. Fiscal Year . Our fiscal year ends on the last Wednesday in December. As a result, a fifty-third week is added to a fiscal year every five or six years. Fiscal 2014 included 53 weeks of operations, whereas 2016 and 2015 each included 52 weeks of operations. Cash Equivalents and Short-term Investments. Our policy is to invest cash in excess of operating requirements in short-term highly liquid investments with an original maturity of three months or less, which we consider to be cash equivalents. Cash and cash equivalents include short-term investments of $0.5 million and $0.9 million at December 28, 2016 and December 30, 2015 , respectively. Receivables. Receivables, which are recorded at net realizable value, primarily consist of trade accounts receivables and financing receivables from franchisees, vendor receivables and credit card receivables. Trade accounts receivables from franchisees consist of royalties, advertising and rent. Financing receivables from franchisees primarily consist of notes from franchisees related to the roll-out of POS equipment. We accrue interest on notes receivable based on the contractual terms. The allowance for doubtful accounts is based on pre-defined criteria and management’s judgment of existing receivables. Receivables that are ultimately deemed to be uncollectible, and for which collection efforts have been exhausted, are written off against the allowance for doubtful accounts. Inventories. Inventories consist of food and beverages and are valued primarily at the lower of cost and net realizable value. Property and Depreciation. Owned property is stated at cost. Property under capital leases is stated at the lesser of its fair value or the net present value of the related minimum lease payments at the lease inception. Maintenance and repairs are expensed as incurred. We depreciate owned property over its estimated useful life using the straight-line method. We amortize property held under capital leases (at capitalized value) over the lesser of its estimated useful life or the initial lease term. In certain situations, one or more option periods may be used in determining the depreciable life of certain leasehold improvements under operating lease agreements, if we deem that an economic penalty will be incurred and exercise of such option periods is reasonably assured. In either circumstance, our policy requires lease term consistency when calculating the depreciation period, in classifying the lease and in computing rent expense. Building assets are assigned estimated useful lives that range from five to 30 years. Equipment assets are assigned lives that range from two to ten years. Leasehold improvements are generally assigned lives between five and 15 years limited by the expected lease term. Goodwill. Amounts recorded as goodwill primarily represent excess reorganization value recognized as a result of our 1998 bankruptcy. We also record goodwill in connection with the acquisition of restaurants from franchisees. Likewise, upon the sale of restaurant operations to franchisees, goodwill is decremented. We test goodwill for impairment at each fiscal year end and more frequently if circumstances indicate impairment may exist. Such indicators include, but are not limited to, a significant decline in our expected future cash flows, a significant adverse decline in our stock price, significantly adverse legal developments and a significant change in the business climate. Other Intangible Assets . Other intangible assets consist primarily of trade names, franchise and license agreements, and reacquired franchise rights. Trade names are considered indefinite-lived intangible assets and are not amortized. Franchise and license agreements and reacquired franchise rights are amortized using the straight-line basis over the term of the related agreement. Reacquired franchise rights resulting from acquisitions are accounted for using the purchase method of accounting and are estimated by management based on the fair value of the assets received. We test trade name assets for impairment at each fiscal year end, and more frequently if circumstances indicate impairment may exist. We assess impairment of franchise and license agreements and reacquired franchise rights whenever changes or events indicate that the carrying value may not be recoverable. Costs incurred to renew or extend the term of recognized intangible assets are recorded in general and administrative expenses in our Consolidated Statements of Income. Long-term Investments. Long-term investments include nonqualified deferred compensation plan assets held in a rabbi trust. Each plan participant's account is comprised of their contribution, our matching contribution and each participant's share of earnings or losses in the plan. The investments of the rabbi trust include debt and equity mutual funds. They are considered trading securities and are reported at fair value in other noncurrent assets with an offsetting liability included in other noncurrent liabilities in our Consolidated Balance Sheets. The realized and unrealized holding gains and losses related to the investments are recorded in other income (expense) with an offsetting amount recorded in general and administrative expenses related to the liability in our Consolidated Statements of Income. During 2016 , 2015 and 2014 , we incurred net gains of $0.9 million , $0.1 million and $0.5 million , respectively. The fair value of the deferred compensation plan investments was $11.2 million and $10.2 million at December 28, 2016 and December 30, 2015 , respectively. Deferred Financing Costs. Costs related to the issuance of debt are deferred and amortized as a component of interest expense using the effective interest method over the terms of the respective debt issuances. Cash Overdrafts. Accounts payable in our Consolidated Balance Sheets include cash overdrafts of $4.1 million and $4.4 million at December 28, 2016 and December 30, 2015 , respectively. Changes in such amounts are reflected in cash flows from financing activities in our Consolidated Statements of Cash Flows. Self-insurance Liabilities. We record liabilities for insurance claims during periods in which we have been insured under large deductible programs or have been self-insured for our medical claims and workers’ compensation, general, product and automobile insurance liabilities. The liabilities for prior and current estimated incurred losses are discounted to their present value based on expected loss payment patterns determined by independent actuaries using our actual historical payments. These estimates include assumptions regarding claims frequency and severity as well as changes in our business environment, medical costs and the regulatory environment that could impact our overall self-insurance costs. Total discounted workers’ compensation, general, product and automobile insurance liabilities at December 28, 2016 and December 30, 2015 were $19.2 million , reflecting a 1.5% discount rate, and $21.1 million , reflecting a 1.0% discount rate, respectively. The related undiscounted amounts at such dates were $20.0 million and $21.6 million , respectively. Income Taxes. We account for income taxes under the asset and liability method. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of existing assets and liabilities and their respective tax bases and operating loss and tax credit carryforwards. As a result of our early adoption of ASU 2015-17, all deferred taxes are reported as noncurrent in our Consolidated Balance Sheets. A valuation allowance reduces our net deferred tax asset to the amount that is more likely than not to be realized. We make certain estimates and judgments in the calculation of our provision for incomes taxes, in the resulting tax liabilities, and in the recoverability of deferred tax assets. We record a liability for unrecognized tax benefits resulting from tax positions taken, or expected to be taken, in an income tax return. We recognize any interest and penalties related to unrecognized tax benefits in income tax expense. Penalties, when incurred, are recognized in general and administrative expense. Assessment of uncertain tax positions requires judgments relating to the amounts, timing and likelihood of resolution. Leases and Subleases. Our policy requires the use of a consistent lease term for calculating the depreciation period for related buildings and leasehold improvements, classifying the lease and computing periodic rent expense increases where the lease terms include escalations in rent over the lease term. The lease term commences on the date we gain access to and control over the leased property. We account for rent escalations in leases on a straight-line basis over the expected lease term. Any rent holidays after lease commencement are recognized on a straight-line basis over the expected lease term, which includes the rent holiday period. Leasehold improvements that have been funded by lessors have historically been insignificant. Any leasehold improvements we make that are funded by lessor incentives or allowances under operating leases are recorded as leasehold improvement assets and amortized over the expected lease term. Such incentives are also recorded as deferred rent and amortized as reductions to lease expense over the expected lease term. We record contingent rent expense based on estimated sales for respective restaurants over the contingency period. Contingent rental income is recognized when earned. Fair Value Measurements. The carrying amounts of cash and cash equivalents, accounts receivables, accounts payable and accrued expenses are deemed to approximate fair value due to the immediate or short-term maturity of these instruments. The fair value of notes receivable approximates the carrying value after consideration of recorded allowances and related risk-based interest rates. The liabilities under our credit facility are carried at historical cost, which approximates fair value. The fair value of our long-term debt is determined based on market prices or, if market prices are not available, the present value of the underlying cash flows discounted at market rates. Employee Benefit Plans. Each year we measure and recognize the funded status of our defined benefit plans in our Consolidated Balance Sheets as of December 31. That date represents the month-end that is closest to our fiscal year-end. The funded status is adjusted for any contributions or significant events (such as a plan amendment, settlement, or curtailment that calls for a remeasurement) that occurs between our fiscal year-end and December 31. Derivative Instruments. We use derivative financial instruments to manage our exposure to interest rate risk. We do not enter into derivative instruments for trading or speculative purposes. All derivatives are recognized on our Consolidated Balance Sheets at fair value based upon quoted market prices. Changes in the fair values of derivatives are recorded in earnings or other comprehensive income ( “ OCI ” ), based on whether the instrument is designated as a hedge transaction. Gains or losses on derivative instruments reported in OCI are classified to earnings in the period the hedged item affects earnings. If the underlying hedge transaction ceases to exist, any associated amounts reported in OCI are reclassified to earnings at that time. Any ineffectiveness is recognized in earnings in the current period. By entering into derivative instruments, we are exposed to counterparty credit risk. When the fair value of a derivative instrument is in an asset position, the counterparty has a liability to us, which creates credit risk for us. We manage our exposure to this risk by selecting counterparties with investment grade credit ratings and regularly monitoring our market position with each counterparty. Contingencies and Litigation. We are subject to legal proceedings involving ordinary and routine claims incidental to our business, as well as legal proceedings that are nonroutine and include compensatory or punitive damage claims. Our ultimate legal and financial liability with respect to such matters cannot be estimated with certainty and requires the use of estimates in recording liabilities for potential litigation settlements. When the reasonable estimate is a range, the recorded loss will be the best estimate within the range. We record legal settlement costs as other operating expenses in our Consolidated Statements of Income as those costs are incurred. Comprehensive Income. Comprehensive income includes net income and OCI items that are excluded from net income under U.S. generally accepted accounting principles. OCI items include additional minimum pension liability adjustments and the effective unrealized portion of changes in the fair value of cash flow hedges. Segment. Denny’s operates in only one segment. All significant revenues and pre-tax earnings relate to retail sales of food and beverages to the general public through either company or franchised restaurants. Company Restaurant Sales. Company restaurant sales are recognized when food and beverage products are sold at company restaurants. We present company restaurant sales net of sales taxes. Gift cards. We sell gift cards which have no stated expiration dates. We recognize revenue from gift cards when the gift card is redeemed by the customer or when we determine the likelihood of redemption is remote (gift card breakage). Breakage is based on our company-specific historical redemption patterns. We recognized $0.3 million , $0.3 million and $0.4 million in breakage on gift cards during 2016 , 2015 and 2014 , respectively. We believe that the amounts recognized for breakage have been and will continue to be insignificant. Franchise and License Fees. We recognize initial franchise and license fees when all of the material obligations have been performed and conditions have been satisfied, typically when operations of a new franchised restaurant have commenced. Continuing fees, such as royalties and rents, are recorded as income. Royalties are recognized in the period in which the sales occurred. During 2016 , 2015 and 2014 , we recorded initial fees of $2.6 million , $2.3 million and $1.8 million , respectively, as a component of franchise and license revenue in our Consolidated Statements of Income. At December 28, 2016 and December 30, 2015 , deferred fees were $2.1 million and $1.9 million , respectively, and are included in other accrued liabilities in the accompanying Consolidated Balance Sheets. For 2016 , 2015 and 2014 , our ten largest franchisees accounted for 29% , 29% and 32% of our franchise revenues, respectively. Advertising Costs . We expense production costs for radio and television advertising in the year in which the commercials are initially aired. Advertising expense for 2016 , 2015 and 2014 was $13.1 million , $12.5 million and $12.3 million , respectively, net of contributions from franchisees to our advertising programs, including local co-operatives, of $76.5 million , $72.5 million and $70.3 million , respectively. Advertising costs are recorded as a component of other operating expenses in our Consolidated Statements of Income. Restructuring and Exit Costs. Restructuring and exit costs consist primarily of the costs of future obligations related to closed restaurants, severance and other restructuring charges for terminated employees, and are included as a component of operating (gains), losses and other charges, net in our Consolidated Statements of Income. Discounted liabilities for future lease costs and the fair value of related subleases of closed restaurants are recorded when the restaurants are closed. All other costs related to closed restaurants are expensed as incurred. In assessing the discounted liabilities for future costs of obligations related to closed restaurants, we make assumptions regarding amounts of future assumed subleases. If these assumptions or their related estimates change in the future, we may be required to record additional exit costs or reduce exit costs previously recorded. Exit costs recorded for each of the periods presented include the effect of such changes in estimates. Disposal or Impairment of Long-lived Assets. We evaluate our long-lived assets for impairment at the restaurant level on a quarterly basis, when assets are identified as held for sale or whenever changes or events indicate that the carrying value may not be recoverable. For assets identified as held for sale, we use the market approach and consider proceeds from similar asset sales. We assess impairment of restaurant-level assets based on the operating cash flows of the restaurant, expected proceeds from the sale of assets and our plans for restaurant closings. Generally, all restaurants with negative cash flows from operations for the most recent twelve months at each quarter end are included in our assessment. For underperforming assets, we use the income approach to determine both the recoverability and estimated fair value of the assets. To estimate future cash flows, we make certain assumptions about expected future operating performance, such as revenue growth, operating margins, risk-adjusted discount rates, and future economic and market conditions. If the long-lived assets of a restaurant are not recoverable based upon estimated future, undiscounted cash flows, we write the assets down to their fair value. If these estimates or their related assumptions change in the future, we may be required to record additional impairment charges. These charges are included as a component of operating (gains), losses and other charges, net in our Consolidated Statements of Income. Assets held for sale consist of real estate properties and/or restaurant operations that we expect to sell within the next year. The assets are reported at the lower of carrying amount or fair value less costs to sell. We cease recording depreciation on assets that are classified as held for sale. If the determination is made that we no longer expect to sell an asset within the next year, the asset is reclassified out of held for sale. Discontinued Operations. We evaluate restaurant closures and assets reclassified to assets held for sale for potential disclosure as discontinued operations. Only disposals resulting in a strategic shift that will have a major effect on our operations and financial results are reported as discontinued operations. There were no such disposals, nor any disposals of individually significant components. The gains and losses related to restaurant closures and assets reclassified to assets held for sale are included as a component of operating (gain), losses and other charges, net in our Consolidated Statements of Income. Gains/Losses on Sales of Restaurants Operations to Franchisees, Real Estate and Other Assets. Generally, gains/losses on sales of restaurant operations to franchisees (which may include real estate), real estate properties and other assets are recognized when the sales are consummated and certain other gain recognition criteria are met. Total gains/losses are included as a component of operating (gains), losses and other charges, net in our Consolidated Statements of Income. Share-Based Compensation. Share-based compensation cost is measured at the grant date, based on the fair value of the award, and is recognized as an expense over the requisite service period. We estimate potential forfeitures of share-based awards and adjust the forfeiture rate over the requisite service period to the extent that actual forfeitures differ, or are expected to differ, from such estimates. Share-based compensation expense is included as a component of general and administrative expenses in our Consolidated Statements of Income. Tax expense or benefit recognized related to share-based compensation is included as a component of provision for income taxes in our Consolidated Statements of Income. Tax benefit in excess of recognized compensation cost is reported as a cash outflow from operating activities and as a cash inflow from financing activities in our Consolidated Statements of Cash Flows. Generally, compensation expense related to restricted stock units, performance shares, performance units and board deferred stock units is based on the number of shares and units expected to vest, the period over which they are expected to vest and the fair market value of our common stock on the date of the grant. For restricted stock units and performance shares that contain a market condition, compensation expense is based on the Monte Carlo valuation method, which utilizes multiple input variables to determine the probability of the Company achieving the market condition and the fair value of the award. The key assumptions used include expected volatility and risk-free interest rates over the term of the award. The amount of certain cash-settled awards is determined based on the date of payment. Therefore, compensation expense related to these cash-settled awards is adjusted to fair value at each balance sheet date. Compensation expense for options is recognized on a straight-line basis over the requisite service period for the entire award. Subsequent to the vesting period, earned stock-settled restricted stock units and performance shares (both of which are equity classified) are paid to the holder in shares of our common stock, and the cash-settled restricted stock units and performance units (both of which are liability classified) are paid to the holder in cash, provided the holder is then still employed with Denny’s or an affiliate. Earnings Per Share . Basic earnings per share is calculated by dividing net income by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated by dividing net income by the weighted average number of common shares and potential common shares outstanding during the period. Newly Adopted Accounting Standards Effective December 31, 2015, we adopted ASU 2015-02, “Consolidation (Topic 810): Amendments to the Consolidation Analysis,” which improves targeted areas of the consolidation guidance and reduces the number of consolidation models. The adoption of this guidance did not have a material impact on our consolidated financial statements. Effective December 31, 2015, we adopted ASU 2015-03, “Interest—Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs,” which simplifies the guidance on the presentation of debt issuance costs. The new guidance requires debt issuance costs to be presented in the balance sheet as a reduction of the related debt liability rather than as an asset. Also effective December 31, 2015, we adopted ASU 2015-15, “Interest—Imputation of Interest (Subtopic 835-30): Presentation and Subsequent Measurement of Debt Issuance Costs Associated with Line-of-Credit Arrangements—Amendments to SEC Paragraphs Pursuant to Staff Announcement at June 18, 2015 EITF Meeting (SEC Update),” which addresses the SEC's comments related to the absence of authoritative guidance within ASU 2015-03 related to line-of-credit arrangements. According to this guidance, the SEC will not object to an entity deferring and presenting debt issuance costs as an asset and subsequently amortizing the deferred debt issuance costs ratably over the term of the line-of-credit arrangement, regardless of whether there are any outstanding borrowings on the line-of-credit arrangement. The adoption of this guidance did not have any impact on our consolidated financial statements and we will continue to classify debt issuance costs as an asset. Effective December 31, 2015, we adopted, on a prospective basis, ASU 2015-05, “Intangibles–Goodwill and Other–Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Fees Paid in a Cloud Computing Arrangement,” which provides guidance about whether a cloud computing arrangement includes a software license. If a software license is included, the customer should account for the license consistent with the acquisition of other software licenses. If a software license is not included, the arrangement should be accounted for as a service contract. The adoption of this guidance did not have a material impact on our consolidated financial statements. Effective December 31, 2015, we adopted ASU 2015-11, “Inventory (Topic 330): Simplifying the Measurement of Inventory,” which requires inventory that is measured using the first-in, first-out method to be measured at the lower of cost and net realizable value. Net realizable value is defined as the estimated selling prices in the ordinary course of business, less reasonably predictable costs of completion, disposal, and transportation. The adoption of this guidance did not have a material impact on our consolidated financial statements. In March 2016, the FASB issued ASU 2016-05, “Derivatives and Hedging (Topic 815): Effect of Derivative Contract Novations on Existing Hedge Accounting Relationships (a consensus of the Emerging Issues Task Force),” which clarifies that a change in the counterparty to a derivative instrument that has been designated as the hedging instrument under Topic 815 does not, in and of itself, require dedesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. We early adopted this guidance as of March 30, 2016 on a prospective basis. The adoption of this guidance did not have any impact on our consolidated financial statements. Accounting Standards to be Adopted In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606)”. The new guidance clarifies the principles used to recognize revenue for all entities and requires companies to recognize revenue when it transfers goods or service to a customer in an amount that reflects the consideration to which a company expects to be entitled. The FASB has subsequently amended this guidance by issuing additional ASU's that provide clarification and further guidance around areas identified as potential implementation issues, including principal versus agent considerations, licensing and identifying performance obligations, assessing collectability, presentation of sales taxes received from customers, noncash consideration, contract modification and clarification of using the full retrospective approach upon adoption. All of the standards are effective for annual and interim periods beginning after December 15, 2017 (our fiscal 2018). The guidance allows for either a retrospective or cumulative effect transition method with early application permitted. The guidance is not expected to impact the recognition of company restaurant sales or royalties from franchised restaurants. Upon adoption, initial franchise fees, which are currently recognized upon the opening of a franchise restaurant, are expected to be deferred and recognized over the term of the underlying franchise agreement. We are currently evaluating the impact this guidance will have on the recognition of other transactions on our consolidated financial statements, including our advertising arrangements with franchisees currently reported on a net versus gross basis in our consolidated statements of earnings, and the effect it will have on our disclosures. We have not yet selected a transition method. In January 2016, the FASB issued ASU 2016-01, “Financial Instruments—Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities”. The new guidance requires equity investments (except those accounted for under the equity method of accounting, or those that result in consolidation of the investee) to be measured at fair value with changes in fair value recognized in net income, requires public business entities to use the exit price notion when measuring the fair value of financial instruments for disclosure purposes, requires separate presentation of financial assets and financial liabilities by measurement category and form of financial asset, and eliminates the requirement for public business entities to disclose the method(s) and significant assumptions used to estimate the fair value that is required to be disclosed for financial instruments measured at amortized cost. ASU 2016-01 is effective for annual and interim periods beginning after December 15, 2017 (our fiscal 2018) with early adoption permitted. We are currently evaluating the impact the adoption of this guidance will have on our consolidated financial statements. In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments”. The new guidance replaces the incurred loss impairment methodology in current GAAP with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information to inform financial statement users of credit loss estimates. ASU 2016-13 is effective for annual and interim periods beginning after December 15, 2019 (our fiscal 2020) with early adoption permitted for annual and interim periods beginning after December 15, 2018 (our fiscal 2019). We do not expect the adoption of this guidance to have a material impact on our consolidated financial statements. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which provides guidance for accounting for leases. The new guidance requires companies to recognize the assets and liabilities for the rights and obligations created by leased assets. The accounting guidance for lessors is largely unchanged. ASU 2016-02 is effective for annual and interim periods beginning after December 15, 2018 (our fiscal 2019) with early adoption permitted. The guidance will be adopted using a modified retrospective approach. Based on a preliminary assessment, we expect the adoption will result in a significant increase in the assets and liabilities on our consolidated balance sheets, as most of our operating lease commitments will be recognized as operating lease liabilities and right-of-use assets. We are continuing our evaluation, which may identify additional impacts this standard will have on our consolidated financial statements and related disclosures. In March 2016, the FASB issued ASU 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting”. The new guidance simplifies several aspects of the accounting for share-based payment transactions, including the recognition of excess tax benefits and deficiencies, the classification of those excess tax benefits on the statement of cash flows, an accounting policy election for forfeitures, the amount an employer can withhold to cover income taxes and still qualify for equity classification and the classification of those taxes paid on the statement of cash flows. ASU 2016-09 is effective for annual and interim periods beginning after December 15, 2016 (our fiscal 2017) with early adoption permitted. The guidance will be applied either prospectively, retrospectively or using a modified retrospective transition method, depending on the area covered in this update. Currently, we do not recognize excess tax benefits until the deduction reduces taxes payable. Therefore, upon adoption, we expect to recognize $6 million - $10 million of excess tax benefits as an increase in deferred tax assets and a cumulative-effect adjustment to retained earnings as of December 29, 2016 (the |