Basis Of Presentation	9 Months Ended
Sep. 30, 2013
Basis Of Presentation [Abstract]
Basis Of Presentation	1. Basis of Presentation The Condensed Consolidated Financial Statements include the accounts of Drew Industries Incorporated and its wholly-owned subsidiaries (collectively, "Drew" or the "Company"). Drew has no unconsolidated subsidiaries. Drew's wholly-owned active subsidiaries are Lippert Components, Inc. and its subsidiaries (collectively, "Lippert"), and Kinro, Inc. and its subsidiaries (collectively, "Kinro"). Drew, through Lippert and Kinro, manufactures a broad array of components for recreational vehicles ("RVs") and manufactured homes, and to a lesser extent manufactures components for modular housing, truck caps and buses, as well as for trailers used to haul boats, livestock, equipment and other cargo. Because of fluctuations in RV dealer inventories, and changes in economic conditions, current and future seasonal industry trends may be different than in prior years. The Condensed Consolidated Financial Statements presented herein have been prepared by the Company in accordance with the accounting policies described in its December 31, 2012 Annual Report on Form 10-K and should be read in conjunction with the Notes to Consolidated Financial Statements which appear in that report. All significant intercompany balances and transactions have been eliminated. Certain prior year balances have been reclassified to conform to current year presentation. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to product returns, sales and purchase rebates, accounts receivable, inventories, goodwill and other intangible assets, income taxes, warranty obligations, self-insurance obligations, lease terminations, asset retirement obligations, long-lived assets, executive succession, post-retirement benefits, stock-based compensation, segment allocations, contingent consideration, environmental liabilities, contingencies and litigation. The Company bases its estimates on historical experience, other available information and 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 resources. Actual results and events could differ significantly from management estimates. In the opinion of management, the information furnished in this Form 10-Q reflects all adjustments necessary for a fair statement of the financial position and results of operations as of and for the nine and three month periods ended September 30, 2013 and 2012. All such adjustments are of a normal recurring nature. The Condensed Consolidated Financial Statements have been prepared in accordance with the instructions to Form 10-Q, and therefore do not include some information necessary to conform to annual reporting requirements.

1. Basis of Presentation

The Condensed Consolidated Financial Statements include the accounts of Drew Industries Incorporated and its wholly-owned subsidiaries (collectively, "Drew" or the "Company"). Drew has no unconsolidated subsidiaries. Drew's wholly-owned active subsidiaries are Lippert Components, Inc. and its subsidiaries (collectively, "Lippert"), and Kinro, Inc. and its subsidiaries (collectively, "Kinro"). Drew, through Lippert and Kinro, manufactures a broad array of components for recreational vehicles ("RVs") and manufactured homes, and to a lesser extent manufactures components for modular housing, truck caps and buses, as well as for trailers used to haul boats, livestock, equipment and other cargo.

Because of fluctuations in RV dealer inventories, and changes in economic conditions, current and future seasonal industry trends may be different than in prior years.

The Condensed Consolidated Financial Statements presented herein have been prepared by the Company in accordance with the accounting policies described in its December 31, 2012 Annual Report on Form 10-K and should be read in conjunction with the Notes to Consolidated Financial Statements which appear in that report. All significant intercompany balances and transactions have been eliminated. Certain prior year balances have been reclassified to conform to current year presentation.

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires the Company to make estimates and judgments that affect the reported amounts of assets, liabilities, net sales and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, the Company evaluates its estimates, including, but not limited to, those related to product returns, sales and purchase rebates, accounts receivable, inventories, goodwill and other intangible assets, income taxes, warranty obligations, self-insurance obligations, lease terminations, asset retirement obligations, long-lived assets, executive succession, post-retirement benefits, stock-based compensation, segment allocations, contingent consideration, environmental liabilities, contingencies and litigation. The Company bases its estimates on historical experience, other available information and 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 resources. Actual results and events could differ significantly from management estimates.

In the opinion of management, the information furnished in this Form 10-Q reflects all adjustments necessary for a fair statement of the financial position and results of operations as of and for the nine and three month periods ended September 30, 2013 and 2012. All such adjustments are of a normal recurring nature. The Condensed Consolidated Financial Statements have been prepared in accordance with the instructions to Form 10-Q, and therefore do not include some information necessary to conform to annual reporting requirements.