Interim Financial Statements	9 Months Ended
Sep. 30, 2017
Quarterly Financial Information Disclosure [Abstract]
Interim Financial Statements	Note 1. Interim Financial Statements Nature of Business NN, Inc., a diversified industrial company, combines advanced engineering and production capabilities with in-depth materials science expertise to design and manufacture high-precision components and assemblies for a variety of markets on a global basis. As used in this Quarterly Report on Form 10-Q, the terms “NN,” the “Company,” “we,” “our,” or “us” refer to NN, Inc., and its subsidiaries. We have historically reported results of operations in three reportable segments: the Precision Bearing Components Group (“PBC”), the Precision Engineered Products Group (“PEP”), and the Autocam Precision Components Group (“APC”). On August 17, 2017, we sold our PBC business. Note 2 in these Notes to Condensed Consolidated Financial Statements provides further information on the sale of the PBC business. After the sale of the PBC business, we had 33 manufacturing facilities in North America, Europe, South America and China. We added three more North American manufacturing facilities in October 2017 (see Note 16 for information about our acquisition subsequent to September 30, 2017). Basis of Presentation The accompanying condensed consolidated financial statements have not been audited, except that the Condensed Consolidated Balance Sheet as of December 31, 2016, was derived from the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2016 (the “2016 Annual Report”), which we filed with the U.S. Securities and Exchange Commission (the “SEC”), on March 16, 2017. Historical periods presented reflect reclassifications to reflect discontinued operations (see Note 2). Historical periods also reflect revisions that we disclosed in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2017 (see Note 15). In management’s opinion, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary to fairly state our results of operations for the three-month and nine-month periods ended September 30, 2017 and 2016; financial position as of September 30, 2017, and December 31, 2016; and cash flows for the nine months ended September 30, 2017 and 2016, on a basis consistent with our audited consolidated financial statements. These adjustments are of a normal recurring nature and are, in the opinion of management, necessary to present fairly the Company’s financial position and operating results for the interim periods. Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted from the interim financial statements presented in this Quarterly Report on Form 10-Q. These unaudited condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and accompanying notes included in the 2016 Annual Report. The results for the nine months ended September 30, 2017, are not necessarily indicative of results for the year ending December 31, 2017, or any other future periods. Certain prior year amounts have been reclassified to conform to the current year’s presentation. Except for per share data or as otherwise indicated, all dollar amounts presented in the tables in these Notes to Condensed Consolidated Financial Statements are in thousands. Prior Periods’ Financial Statement Revision In connection with the preparation of condensed consolidated financial statements as of and for the three-month and six-month periods ended June 30, 2017, we identified misstatements in our previously issued financial statements related to the foreign currency translation of our investment in a China joint venture. We acquired a 49% investment in the joint venture as part of the acquisition of Autocam Corporation (“Autocam”) on August 29, 2014. We remeasured the investment in the joint venture to fair value at the time of the acquisition, and we have accounted for the investment under the equity method of accounting. Following the completion of the Autocam acquisition, we accounted for the investment in the joint venture in U.S. dollars whereas it should have been accounted for in the joint venture’s functional currency of the Chinese Renminbi in accordance with Accounting Standards Codification (“ASC”) Topic 830, Foreign Currency Matters. As a result, we did not correctly account for the investment in the joint venture and the related currency translation adjustment impacts. We previously corrected as out-of-period adjustments certain immaterial misstatements and reflected them in the prior period financial statements, where applicable. These immaterial previously recorded out-of-period adjustments were primarily due to misstatements related to the initial recording of deferred tax assets and liabilities and corresponding adjustments to goodwill as part of the purchase price allocations of the Autocam and PEP acquisitions in 2014 and 2015, the accounting for the goodwill balances from those acquisitions for multi-currency reporting through other comprehensive income, and the mark-to-market adjustments on our interest rate hedge, net of tax, through other comprehensive income. We assessed the materiality of the misstatements on prior periods’ financial statements in accordance with SEC Staff Accounting Bulletin (“SAB”) Topic 1.M, Materiality, codified in ASC Topic 250, Accounting Changes and Error Corrections, (“ASC 250”) and concluded that the misstatements were not material to any prior annual or interim periods. In accordance with ASC 250 (SAB Topic 1.N, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements), we have corrected these misstatements for all prior periods presented by revising the condensed consolidated financial statements and other consolidated financial information included herein. We have revised, and will revise for annual and interim periods in future filings, certain amounts in the consolidated financial statements to correct these misstatements. See Note 15 for additional information on the revision. Newly Adopted Accounting Standards In March 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting. The new standard changes how companies account for certain aspects of share-based payments to employees. Entities must recognize the income tax effects of awards in the statement of operations when the awards vest or are settled (i.e., additional paid-in capital pools were eliminated). The guidance changed regarding employers’ accounting for an employee’s use of shares to satisfy the employer’s statutory income tax withholding obligation and for forfeitures. The guidance was effective for public business entities for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. As of January 1, 2017, we adopted ASU 2016-09, and the effects of the standard are reflected in the three-month and nine-month periods ended September 30, 2017, balances. Upon adoption, we reclassified $0.7 million in historical tax benefits from deferred taxes to retained earnings. We will recognize prospective tax benefits in income tax expense. Tax payments in respect of shares withheld for taxes are now classified in the financing section of the statement of cash flows. The calculation of diluted earnings per share now excludes tax benefits that would have generated more dilutive shares. The effects of the adoption were not material to the financial statements. Issuance of New Accounting Standards Revenue Recognition. In May 2014, the FASB issued a new standard that provides a single, comprehensive revenue recognition model for all contracts with customers and supersedes most of the existing revenue recognition requirements. Under the new guidance, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods or services. The standard also requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Factors that will affect pre-and post-implementation include, but are not limited to, identifying all the contracts that exist and whether incidental obligations or marketing incentives included in some of those contracts are performance obligations. Additionally, we are evaluating the transfer of control of certain consignment contracts which may impact the timing of revenue recognition under the new standard. The standard will be effective for us beginning January 1, 2018. We intend to adopt the standard utilizing the modified retrospective transition method. Under this transition method, we will recognize the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2018, and will apply the new standard beginning with the most current period presented to contracts that are not completed at the date of initial application. We continue to evaluate the adoption method throughout each phase of implementation. While our ability to adopt the standard using the modified retrospective method depends on system readiness and completing our analysis of information necessary to present required footnote disclosures in the consolidated financial statements, the implementation project remains on schedule. We have completed a diagnostic accounting assessment, including an analysis of a representative sample of contracts, to identify areas that will be most significantly impacted by implementation of the new standard. We have also completed initial training to educate contract managers of the technical aspects of the new standard. We are in the process of concluding on and documenting our assessments related to the standard as well as potential system and procedural changes. We are evaluating the impact the new standard will have on our financial condition, results of operations and cash flows. We expect to complete our final evaluation of the impact of adopting the new standard during 2017. Leases. In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 creates Topic 842, Leases, in the ASC and supersedes ASC 840, Leases. Entities that hold numerous equipment and real estate leases, in particular those with numerous operating leases, will be most affected by the new guidance. The lease accounting standard is effective for NN beginning January 1, 2019, with modified retrospective adoption required and early adoption permitted. The amendments in ASU 2016-02 are expected to impact balance sheets at many companies by adding lease-related assets and liabilities. This may affect compliance with contractual agreements and loan covenants. We have performed inquiries within segment locations and compiled information on operating and capital leases. We are currently evaluating the impacts of the lease accounting standard on our financial position, results of operations, and related disclosures. Statement of Cash Flows. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. This standard provides clarification on how certain cash receipts and cash payments are presented and classified on the statement of cash flows. The standard is effective for NN beginning January 1, 2018, and is required to be adopted using a retrospective approach if practicable, with early adoption permitted. We are in the process of assessing the effects of the standard on prior periods. We expect to complete our final evaluation of the impact of adopting the new standard during 2017. Although our analysis of the effects on prior periods is not yet complete, we have identified $31.6 million of cash paid for debt prepayment in April 2017 that is currently classified as an operating cash outflow. Under the new guidance, this $31.6 million will be classified as a financing cash outflow. Goodwill. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, that eliminates the requirement to calculate the implied fair value of goodwill (i.e., Step 2 of the current goodwill impairment test) to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on the current Step 1 test). The standard is effective for NN beginning with impairment tests performed on or after January 1, 2020, with early adoption permitted. We are currently evaluating the impact this new guidance is expected to have on our financial position or results of operations and related disclosures.

Note 1. Interim Financial Statements

Nature of Business

NN, Inc., a diversified industrial company, combines advanced engineering and production capabilities with in-depth materials science expertise to design and manufacture high-precision components and assemblies for a variety of markets on a global basis. As used in this Quarterly Report on Form 10-Q, the terms “NN,” the “Company,” “we,” “our,” or “us” refer to NN, Inc., and its subsidiaries. We have historically reported results of operations in three reportable segments: the Precision Bearing Components Group (“PBC”), the Precision Engineered Products Group (“PEP”), and the Autocam Precision Components Group (“APC”). On August 17, 2017, we sold our PBC business. Note 2 in these Notes to Condensed Consolidated Financial Statements provides further information on the sale of the PBC business. After the sale of the PBC business, we had 33 manufacturing facilities in North America, Europe, South America and China. We added three more North American manufacturing facilities in October 2017 (see Note 16 for information about our acquisition subsequent to September 30, 2017).

Basis of Presentation

The accompanying condensed consolidated financial statements have not been audited, except that the Condensed Consolidated Balance Sheet as of December 31, 2016, was derived from the audited consolidated financial statements included in our Annual Report on Form 10-K for the year ended December 31, 2016 (the “2016 Annual Report”), which we filed with the U.S. Securities and Exchange Commission (the “SEC”), on March 16, 2017. Historical periods presented reflect reclassifications to reflect discontinued operations (see Note 2). Historical periods also reflect revisions that we disclosed in our Quarterly Report on Form 10-Q for the quarter ended June 30, 2017 (see Note 15). In management’s opinion, the accompanying unaudited condensed consolidated financial statements reflect all adjustments necessary to fairly state our results of operations for the three-month and nine-month periods ended September 30, 2017 and 2016; financial position as of September 30, 2017, and December 31, 2016; and cash flows for the nine months ended September 30, 2017 and 2016, on a basis consistent with our audited consolidated financial statements. These adjustments are of a normal recurring nature and are, in the opinion of management, necessary to present fairly the Company’s financial position and operating results for the interim periods.

Certain information and footnote disclosures normally included in the consolidated financial statements prepared in accordance with U.S. generally accepted accounting principles have been condensed or omitted from the interim financial statements presented in this Quarterly Report on Form 10-Q. These unaudited condensed consolidated financial statements should be read in conjunction with our audited consolidated financial statements and accompanying notes included in the 2016 Annual Report. The results for the nine months ended September 30, 2017, are not necessarily indicative of results for the year ending December 31, 2017, or any other future periods. Certain prior year amounts have been reclassified to conform to the current year’s presentation.

Except for per share data or as otherwise indicated, all dollar amounts presented in the tables in these Notes to Condensed Consolidated Financial Statements are in thousands.

Prior Periods’ Financial Statement Revision

In connection with the preparation of condensed consolidated financial statements as of and for the three-month and six-month periods ended June 30, 2017, we identified misstatements in our previously issued financial statements related to the foreign currency translation of our investment in a China joint venture. We acquired a 49% investment in the joint venture as part of the acquisition of Autocam Corporation (“Autocam”) on August 29, 2014. We remeasured the investment in the joint venture to fair value at the time of the acquisition, and we have accounted for the investment under the equity method of accounting. Following the completion of the Autocam acquisition, we accounted for the investment in the joint venture in U.S. dollars whereas it should have been accounted for in the joint venture’s functional currency of the Chinese Renminbi in accordance with Accounting Standards Codification (“ASC”) Topic 830, Foreign Currency Matters. As a result, we did not correctly account for the investment in the joint venture and the related currency translation adjustment impacts.

We previously corrected as out-of-period adjustments certain immaterial misstatements and reflected them in the prior period financial statements, where applicable. These immaterial previously recorded out-of-period adjustments were primarily due to misstatements related to the initial recording of deferred tax assets and liabilities and corresponding adjustments to goodwill as part of the purchase price allocations of the Autocam and PEP acquisitions in 2014 and 2015, the accounting for the goodwill balances from those acquisitions for multi-currency reporting through other comprehensive income, and the mark-to-market adjustments on our interest rate hedge, net of tax, through other comprehensive income.

We assessed the materiality of the misstatements on prior periods’ financial statements in accordance with SEC Staff Accounting Bulletin (“SAB”) Topic 1.M, Materiality, codified in ASC Topic 250, Accounting Changes and Error Corrections, (“ASC 250”) and concluded that the misstatements were not material to any prior annual or interim periods. In accordance with ASC 250 (SAB Topic 1.N, Considering the Effects of Prior Year Misstatements when Quantifying Misstatements in Current Year Financial Statements), we have corrected these misstatements for all prior periods presented by revising the condensed consolidated financial statements and other consolidated financial information included herein. We have revised, and will revise for annual and interim periods in future filings, certain amounts in the consolidated financial statements to correct these misstatements. See Note 15 for additional information on the revision.

Newly Adopted Accounting Standards

In March 2016, the Financial Accounting Standards Board (the “FASB”) issued Accounting Standards Update (“ASU”) 2016-09, Improvements to Employee Share-Based Payment Accounting. The new standard changes how companies account for certain aspects of share-based payments to employees. Entities must recognize the income tax effects of awards in the statement of operations when the awards vest or are settled (i.e., additional paid-in capital pools were eliminated). The guidance changed regarding employers’ accounting for an employee’s use of shares to satisfy the employer’s statutory income tax withholding obligation and for forfeitures. The guidance was effective for public business entities for fiscal years beginning after December 15, 2016, and interim periods within those fiscal years. As of January 1, 2017, we adopted ASU 2016-09, and the effects of the standard are reflected in the three-month and nine-month periods ended September 30, 2017, balances. Upon adoption, we reclassified $0.7 million in historical tax benefits from deferred taxes to retained earnings. We will recognize prospective tax benefits in income tax expense. Tax payments in respect of shares withheld for taxes are now classified in the financing section of the statement of cash flows. The calculation of diluted earnings per share now excludes tax benefits that would have generated more dilutive shares. The effects of the adoption were not material to the financial statements.

Issuance of New Accounting Standards

Revenue Recognition. In May 2014, the FASB issued a new standard that provides a single, comprehensive revenue recognition model for all contracts with customers and supersedes most of the existing revenue recognition requirements. Under the new guidance, revenue is recognized when a customer obtains control of promised goods or services in an amount that reflects the consideration the entity expects to receive in exchange for those goods or services. The standard also requires disclosure of the nature, amount, timing and uncertainty of revenue and cash flows arising from contracts with customers. Factors that will affect pre-and post-implementation include, but are not limited to, identifying all the contracts that exist and whether incidental obligations or marketing incentives included in some of those contracts are performance obligations. Additionally, we are evaluating the transfer of control of certain consignment contracts which may impact the timing of revenue recognition under the new standard.

The standard will be effective for us beginning January 1, 2018. We intend to adopt the standard utilizing the modified retrospective transition method. Under this transition method, we will recognize the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings as of January 1, 2018, and will apply the new standard beginning with the most current period presented to contracts that are not completed at the date of initial application. We continue to evaluate the adoption method throughout each phase of implementation.

While our ability to adopt the standard using the modified retrospective method depends on system readiness and completing our analysis of information necessary to present required footnote disclosures in the consolidated financial statements, the implementation project remains on schedule. We have completed a diagnostic accounting assessment, including an analysis of a representative sample of contracts, to identify areas that will be most significantly impacted by implementation of the new standard. We have also completed initial training to educate contract managers of the technical aspects of the new standard. We are in the process of concluding on and documenting our assessments related to the standard as well as potential system and procedural changes. We are evaluating the impact the new standard will have on our financial condition, results of operations and cash flows. We expect to complete our final evaluation of the impact of adopting the new standard during 2017.

Leases. In February 2016, the FASB issued ASU 2016-02, Leases. ASU 2016-02 creates Topic 842, Leases, in the ASC and supersedes ASC 840, Leases. Entities that hold numerous equipment and real estate leases, in particular those with numerous operating leases, will be most affected by the new guidance. The lease accounting standard is effective for NN beginning January 1, 2019, with modified retrospective adoption required and early adoption permitted. The amendments in ASU 2016-02 are expected to impact balance sheets at many companies by adding lease-related assets and liabilities. This may affect compliance with contractual agreements and loan covenants. We have performed inquiries within segment locations and compiled information on operating and capital leases. We are currently evaluating the impacts of the lease accounting standard on our financial position, results of operations, and related disclosures.

Statement of Cash Flows. In August 2016, the FASB issued ASU 2016-15, Classification of Certain Cash Receipts and Cash Payments. This standard provides clarification on how certain cash receipts and cash payments are presented and classified on the statement of cash flows. The standard is effective for NN beginning January 1, 2018, and is required to be adopted using a retrospective approach if practicable, with early adoption permitted. We are in the process of assessing the effects of the standard on prior periods. We expect to complete our final evaluation of the impact of adopting the new standard during 2017. Although our analysis of the effects on prior periods is not yet complete, we have identified $31.6 million of cash paid for debt prepayment in April 2017 that is currently classified as an operating cash outflow. Under the new guidance, this $31.6 million will be classified as a financing cash outflow.

Goodwill. In January 2017, the FASB issued ASU 2017-04, Intangibles – Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, that eliminates the requirement to calculate the implied fair value of goodwill (i.e., Step 2 of the current goodwill impairment test) to measure a goodwill impairment charge. Instead, entities will record an impairment charge based on the excess of a reporting unit’s carrying amount over its fair value (i.e., measure the charge based on the current Step 1 test). The standard is effective for NN beginning with impairment tests performed on or after January 1, 2020, with early adoption permitted. We are currently evaluating the impact this new guidance is expected to have on our financial position or results of operations and related disclosures.