Legal Contingencies	9 Months Ended
Sep. 30, 2015
Commitments and Contingencies Disclosure [Abstract]
Legal Contingencies	Legal Contingencies The Company has been named as a defendant in certain pending lawsuits in the normal course of business (collectively, the “Pending Lawsuits”). It is the policy of management to disclose the amount or range of reasonably possible losses. In the opinion of management, after consulting with legal counsel, any losses resulting from Pending Lawsuits should not have a material effect on the Company’s financial position, cash flows or results of operations. The Company is also the subject of other proceedings as further described below. Regulatory Actions In August 2013, the Environmental Protection Agency (“EPA”) and the U.S. Dept. of Justice (“DoJ”) commenced an investigation into allegations of low pH wastewater releases claimed to have occurred between 2009 and 2013 at Ozark Mountain Technologies ("OMT"), a subsidiary of LMI (the “Waste Water Allegations”). On April 24, 2015, the Company settled the Waste Water Allegations pursuant to a settlement agreement with DoJ (“Plea Agreement”). Per the terms of the Plea Agreement, OMT plead guilty to one count of negligently violating the Federal Water Pollution Control Act and paid a fine of $694 in the quarter ended June 30, 2015. In connection with the Plea Agreement, DoJ agreed that no further federal criminal or civil prosecution will be brought against OMT relative to certain other possible instances of environmental non-compliance that the Company voluntarily reported to the EPA in December 2013 as part of the EPA’s Audit Policy. In November, 2013, the Attorney General of the State of Missouri (the “Missouri AG”) contacted LMI regarding alleged violations of certain state environmental regulations involving the discharge of pollutants and water contaminants claimed to have occurred in 2011 by OMT (the “Missouri AG Matter”). On February 25, 2015, the Missouri AG filed a Petition against OMT alleging pollution of state waters, violation of pretreatment regulations and violation of water quality standards. In the quarter ended June 30, 2015, OMT settled the Missouri AG Matter and in July of 2015 paid civil penalties of $175. The fine and civil penalties paid in connection with both settlements described above were consistent with the previously established, respective, loss contingencies as disclosed in the Company’s 2014 Form 10-K, Item 3 - Legal Proceedings. Civil Action In December 2012, OMT became an indirect subsidiary of LMI as a result of LMI’s acquisition of Valent Aerostructures, LLC (“Valent”) from the former equity owners of Valent, including Tech Investments, LLC and Tech Investments II, LLC (together, “Tech”). Also as a result of the transaction, Tech became the beneficial owners of approximately 5.5% of LMI’s common stock. Pursuant to the terms of the purchase agreement, as amended (the “Valent Purchase Agreement”), $5,000 of the purchase price remained subject to an indemnification escrow arrangement (the “Escrow Funds”) and 783,798 shares of LMI’s common stock issued as part of the purchase price were subject to indemnification lock-up agreements (the “Locked-Up Shares”). On September 22, 2015, LMI and the former equity owners of Valent (the “Parties”) submitted to mediation and executed an agreement setting forth terms of a settlement with respect to the resolution of certain indemnification claims and other disputes involving, among other things, the OMT matters discussed above, and on November 5, 2015, the Parties executed the definitive settlement documents (the agreement and documents collectively being referred to as the “Settlement Agreements”). The claims and disputes resolved by the settlement had become the subject of legal proceedings that commenced with the filing of a declaratory action by Tech in December 2014 (the “Tech Lawsuit”). Pursuant to the terms of the Settlement Agreements, (a) the Tech Lawsuit will be dismissed with prejudice, (b) $3,109 of the Escrow Funds will be disbursed to the Company and the remaining amount of Escrow Funds will be retained by Tech, (c) Tech has assumed an approximate $1,167 payment obligation of the Company to a predecessor owner of OMT that remained under a purchase agreement the Company acquired as part of the Company’s acquisition of Valent; (d) the Locked-up Shares will be released to Tech, excluding any portion needed to secure Tech’s obligation described in subsection (c) above; and (e) all parties entered into a mutual release of claims and disputes other than those based on certain environmental representations of the former equity owners of Valent under the Valent Purchase Agreement. The settlement also resulted in the Company assuming other liabilities of $484, recording the write-off of a previously recorded receivable of $389 and recording other expenses of $68. The net impact of the settlement resulted in a gain of $3,325 which is recorded in selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Operations.

Legal Contingencies

The Company has been named as a defendant in certain pending lawsuits in the normal course of business (collectively, the “Pending Lawsuits”). It is the policy of management to disclose the amount or range of reasonably possible losses. In the opinion of management, after consulting with legal counsel, any losses resulting from Pending Lawsuits should not have a material effect on the Company’s financial position, cash flows or results of operations. The Company is also the subject of other proceedings as further described below.

Regulatory Actions

In August 2013, the Environmental Protection Agency (“EPA”) and the U.S. Dept. of Justice (“DoJ”) commenced an investigation into allegations of low pH wastewater releases claimed to have occurred between 2009 and 2013 at Ozark Mountain Technologies ("OMT"), a subsidiary of LMI (the “Waste Water Allegations”). On April 24, 2015, the Company settled the Waste Water Allegations pursuant to a settlement agreement with DoJ (“Plea Agreement”). Per the terms of the Plea Agreement, OMT plead guilty to one count of negligently violating the Federal Water Pollution Control Act and paid a fine of $694 in the quarter ended June 30, 2015. In connection with the Plea Agreement, DoJ agreed that no further federal criminal or civil prosecution will be brought against OMT relative to certain other possible instances of environmental non-compliance that the Company voluntarily reported to the EPA in December 2013 as part of the EPA’s Audit Policy.

In November, 2013, the Attorney General of the State of Missouri (the “Missouri AG”) contacted LMI regarding alleged violations of certain state environmental regulations involving the discharge of pollutants and water contaminants claimed to have occurred in 2011 by OMT (the “Missouri AG Matter”). On February 25, 2015, the Missouri AG filed a Petition against OMT alleging pollution of state waters, violation of pretreatment regulations and violation of water quality standards. In the quarter ended June 30, 2015, OMT settled the Missouri AG Matter and in July of 2015 paid civil penalties of $175.

The fine and civil penalties paid in connection with both settlements described above were consistent with the previously established, respective, loss contingencies as disclosed in the Company’s 2014 Form 10-K, Item 3 - Legal Proceedings.

Civil Action

In December 2012, OMT became an indirect subsidiary of LMI as a result of LMI’s acquisition of Valent Aerostructures, LLC (“Valent”) from the former equity owners of Valent, including Tech Investments, LLC and Tech Investments II, LLC (together, “Tech”). Also as a result of the transaction, Tech became the beneficial owners of approximately 5.5% of LMI’s common stock. Pursuant to the terms of the purchase agreement, as amended (the “Valent Purchase Agreement”), $5,000 of the purchase price remained subject to an indemnification escrow arrangement (the “Escrow Funds”) and 783,798 shares of LMI’s common stock issued as part of the purchase price were subject to indemnification lock-up agreements (the “Locked-Up Shares”). On September 22, 2015, LMI and the former equity owners of Valent (the “Parties”) submitted to mediation and executed an agreement setting forth terms of a settlement with respect to the resolution of certain indemnification claims and other disputes involving, among other things, the OMT matters discussed above, and on November 5, 2015, the Parties executed the definitive settlement documents (the agreement and documents collectively being referred to as the “Settlement Agreements”). The claims and disputes resolved by the settlement had become the subject of legal proceedings that commenced with the filing of a declaratory action by Tech in December 2014 (the “Tech Lawsuit”). Pursuant to the terms of the Settlement Agreements, (a) the Tech Lawsuit will be dismissed with prejudice, (b) $3,109 of the Escrow Funds will be disbursed to the Company and the remaining amount of Escrow Funds will be retained by Tech, (c) Tech has assumed an approximate $1,167 payment obligation of the Company to a predecessor owner of OMT that remained under a purchase agreement the Company acquired as part of the Company’s acquisition of Valent; (d) the Locked-up Shares will be released to Tech, excluding any portion needed to secure Tech’s obligation described in subsection (c) above; and (e) all parties entered into a mutual release of claims and disputes other than those based on certain environmental representations of the former equity owners of Valent under the Valent Purchase Agreement. The settlement also resulted in the Company assuming other liabilities of $484, recording the write-off of a previously recorded receivable of $389 and recording other expenses of $68. The net impact of the settlement resulted in a gain of $3,325 which is recorded in selling, general and administrative expenses in the accompanying Condensed Consolidated Statements of Operations.