Summary of Significant Accounting Policies (Policies)	6 Months Ended
Jun. 28, 2014
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The unaudited condensed consolidated financial statements include the accounts of Ducommun Incorporated and its subsidiaries (“Ducommun,” the “Company,” “we,” “us” or “our”), after eliminating intercompany balances and transactions. The December 31, 2013 condensed consolidated balance sheet data was derived from audited financial statements, but does not contain all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”). Our significant accounting policies were described in Part IV, Item 15(a)(1), “Note 1. Summary of Significant Accounting Policies” in our Annual Report on Form 10-K for the year ended December 31, 2013. We followed the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2013. In the opinion of management, all adjustments, consisting of recurring accruals, have been made that are necessary to fairly state our condensed consolidated financial position, statements of income, comprehensive income and cash flows in accordance with GAAP for the periods covered by this Quarterly Report on Form 10-Q. The results of operations for the three and six months ended June 28, 2014 are not necessarily indicative of the results to be expected for the full year ending December 31, 2014. Our fiscal quarters end on the Saturday closest to the end of March, June and September for the first three fiscal quarters of each year, and ends on December 31 for our fourth fiscal quarter. Certain reclassifications have been made to prior period amounts to conform to the current year’s presentation.
Use of Estimates	Use of Estimates Certain amounts and disclosures included in the unaudited condensed consolidated financial statements required management to make estimates and judgments that affect the amounts of assets, liabilities, revenues and expenses, and related disclosures of contingent assets and liabilities. These estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.
Description of Business	Description of Business We are a leading global provider of engineering and manufacturing services for high-performance products and high-cost-of failure applications used primarily in the aerospace, defense, industrial, natural resources, medical and other industries. Our subsidiaries are organized into two strategic businesses: Ducommun AeroStructures (“DAS”) and Ducommun LaBarge Technologies (“DLT”), each of which is a reportable operating segment. DAS designs, engineers and manufactures large, complex contoured aerospace structural components and assemblies and supplies composite and metal bonded structures and assemblies. DAS products are used on commercial aircraft, military fixed-wing aircraft and military and commercial rotary-wing aircraft. DLT designs, engineers and manufactures high-reliability products used in worldwide technology-driven markets including aerospace and defense, natural resources, industrial and medical and other end-use markets. DLT’s product offerings range from prototype development to complex assemblies. All reportable operating segments follow the same accounting principles.
Earnings per Share	Earnings Per Share Basic earnings per share are computed by dividing income available to common shareholders by the weighted-average number of common shares outstanding in each period. Diluted earnings per share are computed by dividing income available to common shareholders plus income associated with dilutive securities by the weighted-average number of common shares outstanding, plus any potential dilutive shares that could be issued if exercised or converted into common stock in each period.
Cash Equivalents	Cash and Cash Equivalents Our cash accounts are not reduced for checks written until the checks are presented for payment and paid by our bank. Cash equivalents consist of highly liquid instruments purchased with original maturities of three months or less. These assets are valued at cost, which approximates fair value, which we classify as Level 1. See Fair Value below.
Provision for Estimated Losses on Contracts	Provision for Estimated Losses on Contracts Provisions for estimated losses on contracts are recorded during the period in which it is determined that total anticipated contract costs will exceed total anticipated contract revenues. The provisions for estimated losses on contracts require management to make certain estimates and assumptions, including those with respect to the future revenue under a contract and the future cost to complete the contract. Management's estimate of the future cost to complete a contract may include assumptions as to improvements in manufacturing efficiency, reductions in operating and material costs, and our ability to resolve claims and assertions with our customers. If any of these or other assumptions and estimates do not materialize in the future, we may be required to record additional provisions for estimated losses on contracts.
Inventory Valuation	Inventory Valuation Inventories are stated at the lower of cost or market, cost being determined on a first-in, first-out basis. Market value for raw materials is based on replacement costs, and is based on net realizable value for other inventory classifications. Inventoried costs include raw materials, outside processing, direct labor and allocated overhead, adjusted for any abnormal amounts of idle facility expense, freight, handling costs, and wasted materials (spoilage) incurred. Costs under long-term contracts are accumulated into, and removed from, inventory on the same basis as other contracts. We assess the inventory carrying value and reduce it, if necessary, to its net realizable value based on customer orders on hand, and internal demand forecasts using management’s best estimates given information currently available. We maintain an allowance for potentially excess and obsolete inventories and inventories that are carried at costs that are higher than their estimated net realizable values.
Out of Period Adjustments	Out of Period Adjustments During the third quarter of 2013, we determined that approximately $1.1 million of inventory had not been valued correctly at our DLT operating segment for periods originating in 2010 through the second quarter of 2013. The errors were attributed to the following quarters; $0.3 million in Q2 2010, $0.5 million in Q2 2011, $0.1 million in Q4 2012, $0.1 million in Q1 2013 and $0.1 million in Q2 2013. We assessed the materiality of these errors and concluded they were immaterial to currently reported annual amounts and previously reported annual and interim amounts. We corrected the errors in the third quarter of 2013 and recorded a $1.1 million charge for inventory reserves for the DLT operating segment and did not restate our consolidated financial statements for the prior annual or interim periods.
Production Cost of Contracts	Production Cost of Contracts Production cost of contracts includes non-recurring production costs, such as design and engineering costs, and tooling and other special-purpose machinery necessary to build parts as specified in a contract. Production costs of contracts are recorded to cost of goods sold using the units of delivery method. We review long-lived assets within production costs of contracts for impairment on an annual basis (in the fourth quarter for us) or when events or changes in circumstances indicate that the carrying value of our long-lived assets may not be recoverable. An impairment charge is recognized when the carrying value of an asset exceeds the projected undiscounted future cash flows expected from its use and disposal.
Fair Value	Fair Value Assets and liabilities that are measured, recorded or disclosed at fair value on a recurring basis are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1, the highest level, refers to the values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant observable inputs. Level 3, the lowest level, includes fair values estimated using significant unobservable inputs.
Accumulated Other Comprehensive Loss	Accumulated Other Comprehensive Loss Accumulated other comprehensive loss, as reflected in the consolidated balance sheets under the equity section, was comprised of cumulative pension and retirement liability adjustments, net of tax.
Recent Accounting Pronouncements	Recent Accounting Pronouncements New Accounting Standards Adopted in 2014 In July 2013, the FASB issued Accounting Standards Update 2013-11, “Income Taxes (Topic 740)” (“ASU 2013-11”), which required the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. This guidance was effective for fiscal years beginning after December 15, 2013, which is our fiscal year 2014, with early adoption permitted. The adoption of this standard at the beginning of our fiscal year 2014 reduced deferred tax assets by approximately $0.6 million as of June 28,2014. In February 2013, the FASB issued ASU 2013-04, “Liabilities (Topic 405)” (“ASU 2013-04”), which provided guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP. The new guidance was effective for us beginning January 1, 2014. Early adoption was permitted. The adoption of this standard at the beginning of our fiscal year 2014 did not have a material impact on our condensed consolidated financial statements.

Summary of Significant Accounting Policies (Policies)

6 Months Ended

Jun. 28, 2014

The unaudited condensed consolidated financial statements include the accounts of Ducommun Incorporated and its subsidiaries (“Ducommun,” the “Company,” “we,” “us” or “our”), after eliminating intercompany balances and transactions. The December 31, 2013 condensed consolidated balance sheet data was derived from audited financial statements, but does not contain all disclosures required by accounting principles generally accepted in the United States of America (“GAAP”).

Our significant accounting policies were described in Part IV, Item 15(a)(1), “Note 1. Summary of Significant Accounting Policies” in our Annual Report on Form 10-K for the year ended December 31, 2013. We followed the same accounting policies for interim reporting. The financial information included in this Quarterly Report on Form 10-Q should be read in conjunction with our Annual Report on Form 10-K for the year ended December 31, 2013.

In the opinion of management, all adjustments, consisting of recurring accruals, have been made that are necessary to fairly state our condensed consolidated financial position, statements of income, comprehensive income and cash flows in accordance with GAAP for the periods covered by this Quarterly Report on Form 10-Q. The results of operations for the three and six months ended June 28, 2014 are not necessarily indicative of the results to be expected for the full year ending December 31, 2014.

Our fiscal quarters end on the Saturday closest to the end of March, June and September for the first three fiscal quarters of each year, and ends on December 31 for our fourth fiscal quarter.

Certain reclassifications have been made to prior period amounts to conform to the current year’s presentation.

Use of Estimates

Certain amounts and disclosures included in the unaudited condensed consolidated financial statements required management to make estimates and judgments that affect the amounts of assets, liabilities, revenues and expenses, and related disclosures of contingent assets and liabilities. These estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates.

Description of Business

We are a leading global provider of engineering and manufacturing services for high-performance products and high-cost-of failure applications used primarily in the aerospace, defense, industrial, natural resources, medical and other industries. Our subsidiaries are organized into two strategic businesses: Ducommun AeroStructures (“DAS”) and Ducommun LaBarge Technologies (“DLT”), each of which is a reportable operating segment. DAS designs, engineers and manufactures large, complex contoured aerospace structural components and assemblies and supplies composite and metal bonded structures and assemblies. DAS products are used on commercial aircraft, military fixed-wing aircraft and military and commercial rotary-wing aircraft. DLT designs, engineers and manufactures high-reliability products used in worldwide technology-driven markets including aerospace and defense, natural resources, industrial and medical and other end-use markets. DLT’s product offerings range from prototype development to complex assemblies. All reportable operating segments follow the same accounting principles.

Earnings per Share

Earnings Per Share

Basic earnings per share are computed by dividing income available to common shareholders by the weighted-average number of common shares outstanding in each period. Diluted earnings per share are computed by dividing income available to common shareholders plus income associated with dilutive securities by the weighted-average number of common shares outstanding, plus any potential dilutive shares that could be issued if exercised or converted into common stock in each period.

Cash Equivalents

Cash and Cash Equivalents

Our cash accounts are not reduced for checks written until the checks are presented for payment and paid by our bank. Cash equivalents consist of highly liquid instruments purchased with original maturities of three months or less. These assets are valued at cost, which approximates fair value, which we classify as Level 1. See Fair Value below.

Provision for Estimated Losses on Contracts

Provisions for estimated losses on contracts are recorded during the period in which it is determined that total anticipated contract costs will exceed total anticipated contract revenues. The provisions for estimated losses on contracts require management to make certain estimates and assumptions, including those with respect to the future revenue under a contract and the future cost to complete the contract. Management's estimate of the future cost to complete a contract may include assumptions as to improvements in manufacturing efficiency, reductions in operating and material costs, and our ability to resolve claims and assertions with our customers. If any of these or other assumptions and estimates do not materialize in the future, we may be required to record additional provisions for estimated losses on contracts.

Inventory Valuation

Inventories are stated at the lower of cost or market, cost being determined on a first-in, first-out basis. Market value for raw materials is based on replacement costs, and is based on net realizable value for other inventory classifications. Inventoried costs include raw materials, outside processing, direct labor and allocated overhead, adjusted for any abnormal amounts of idle facility expense, freight, handling costs, and wasted materials (spoilage) incurred. Costs under long-term contracts are accumulated into, and removed from, inventory on the same basis as other contracts. We assess the inventory carrying value and reduce it, if necessary, to its net realizable value based on customer orders on hand, and internal demand forecasts using management’s best estimates given information currently available. We maintain an allowance for potentially excess and obsolete inventories and inventories that are carried at costs that are higher than their estimated net realizable values.

Out of Period Adjustments

During the third quarter of 2013, we determined that approximately $1.1 million of inventory had not been valued correctly at our DLT operating segment for periods originating in 2010 through the second quarter of 2013. The errors were attributed to the following quarters; $0.3 million in Q2 2010, $0.5 million in Q2 2011, $0.1 million in Q4 2012, $0.1 million in Q1 2013 and $0.1 million in Q2 2013. We assessed the materiality of these errors and concluded they were immaterial to currently reported annual amounts and previously reported annual and interim amounts. We corrected the errors in the third quarter of 2013 and recorded a $1.1 million charge for inventory reserves for the DLT operating segment and did not restate our consolidated financial statements for the prior annual or interim periods.

Production Cost of Contracts

Production cost of contracts includes non-recurring production costs, such as design and engineering costs, and tooling and other special-purpose machinery necessary to build parts as specified in a contract. Production costs of contracts are recorded to cost of goods sold using the units of delivery method. We review long-lived assets within production costs of contracts for impairment on an annual basis (in the fourth quarter for us) or when events or changes in circumstances indicate that the carrying value of our long-lived assets may not be recoverable. An impairment charge is recognized when the carrying value of an asset exceeds the projected undiscounted future cash flows expected from its use and disposal.

Fair Value

Assets and liabilities that are measured, recorded or disclosed at fair value on a recurring basis are categorized using the fair value hierarchy. The fair value hierarchy has three levels based on the reliability of the inputs used to determine fair value. Level 1, the highest level, refers to the values determined based on quoted prices in active markets for identical assets. Level 2 refers to fair values estimated using significant observable inputs. Level 3, the lowest level, includes fair values estimated using significant unobservable inputs.

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss, as reflected in the consolidated balance sheets under the equity section, was comprised of cumulative pension and retirement liability adjustments, net of tax.

Recent Accounting Pronouncements

New Accounting Standards Adopted in 2014

In July 2013, the FASB issued Accounting Standards Update 2013-11, “Income Taxes (Topic 740)” (“ASU 2013-11”), which required the netting of unrecognized tax benefits against a deferred tax asset for a loss or other carryforward that would apply in settlement of the uncertain tax positions. This guidance was effective for fiscal years beginning after December 15, 2013, which is our fiscal year 2014, with early adoption permitted. The adoption of this standard at the beginning of our fiscal year 2014 reduced deferred tax assets by approximately $0.6 million as of June 28,2014.

In February 2013, the FASB issued ASU 2013-04, “Liabilities (Topic 405)” (“ASU 2013-04”), which provided guidance for the recognition, measurement and disclosure of obligations resulting from joint and several liability arrangements for which the total amount of the obligation is fixed at the reporting date, except for obligations addressed within existing guidance in GAAP. The new guidance was effective for us beginning January 1, 2014. Early adoption was permitted. The adoption of this standard at the beginning of our fiscal year 2014 did not have a material impact on our condensed consolidated financial statements.