Triumph (TGI) 10-Q 4 Nov 13 2014 Q2 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information Document	3 Months Ended
	Sep. 30, 2013	Nov. 01, 2013
Entity Information [Line Items]	'	'
Entity Registrant Name	'TRIUMPH GROUP INC	'
Entity Central Index Key	'0001021162	'
Current Fiscal Year End Date	'--03-31	'
Entity Filer Category	'Large Accelerated Filer	'
Document Type	'10-Q	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2014	'
Document Fiscal Period Focus	'Q2	'
Amendment Flag	'false	'
Entity Common Stock, Shares Outstanding	'	52,052,113
Entity Well-known Seasoned Issuer	'Yes	'
Entity Voluntary Filers	'No	'
Entity Current Reporting Status	'Yes	'

Consolidated_Balance_Sheets

Consolidated Balance Sheets (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$22,443	$32,037
Trade and other receivables, less allowance for doubtful accounts of $6,423 and $5,372	434,860	433,984
Inventories, net of unliquidated progress payments of $140,624 and $124,128	1,095,502	987,899
Rotable assets	38,172	34,853
Deferred income taxes	51,140	99,546
Prepaid and other current assets	20,072	23,593
Assets Held-for-sale, Current	0	14,747
Total current assets	1,662,189	1,626,659
Property and equipment, net	898,631	815,084
Goodwill	1,740,155	1,717,400
Intangible assets, net	943,032	958,359
Other, net	68,267	66,792
Total assets	5,312,274	5,184,294
Current liabilities:	'	'
Current portion of long-term debt	48,894	133,930
Accounts payable	290,188	327,426
Accrued expenses	264,546	276,668
Liabilities of Assets Held-for-sale	0	2,621
Total current liabilities	603,628	740,645
Long-term debt, less current portion	1,399,398	1,195,933
Accrued pension and other postretirement benefits, noncurrent	597,709	671,175
Deferred income taxes, noncurrent	339,597	330,128
Other noncurrent liabilities	184,827	201,255
Stockholders’ equity:	'	'
Common stock, $.001 par value, 100,000,000 shares authorized, 52,013,057 and 50,123,035 shares issued; 52,013,057 and 50,123,035 shares outstanding	52	50
Capital in excess of par value	861,274	848,372
Accumulated other comprehensive loss	-56,329	-60,972
Retained earnings	1,382,118	1,257,708
Total stockholders' equity	2,187,115	2,045,158
Total liabilities and stockholders' equity	$5,312,274	$5,184,294

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet Parenthetical (Parentheticals) (USD $)	Sep. 30, 2013	Mar. 31, 2012
In Thousands, except Share data, unless otherwise specified
Allowance for doubtful accounts	$6,423	$5,372
Unliquidated progress payments	$140,624	$124,128
Common stock, par value	$0.00	$0.00
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	52,013,057	50,123,035
Common stock, shares outstanding	52,013,057	50,123,035

Consolidated_Statements_of_Inc

Consolidated Statements of Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net sales	$967,345	$938,181	$1,911,028	$1,825,869
Operating costs and expenses:	'	'	'	'
Cost of sales (exclusive of depreciation and amortization shown separately below)	771,318	703,654	1,467,789	1,354,931
Selling, general and administrative	63,583	56,193	130,300	118,152
Depreciation and amortization	38,244	31,998	76,178	63,813
Relocation Charges	1,229	0	2,444	0
Acquisition and integration expenses	0	1,432	0	1,977
Early retirement incentives	0	-1,957	0	-3,107
Operating expenses	874,374	795,234	1,676,711	1,541,980
Operating income	92,971	142,947	234,317	283,889
Interest expense and other	20,321	16,668	40,031	33,900
Income from continuing operations before income taxes	72,650	126,279	194,286	249,989
Income tax expense	23,134	46,088	65,727	93,466
Net income	$49,516	$80,191	$128,559	$156,523
Earnings per share—basic:	$0.96	$1.61	$2.51	$3.16
Weighted-average common shares outstanding-basic (in shares)	51,807	49,657	51,311	49,536
Earnings per share—diluted:	$0.94	$1.53	$2.43	$2.99
Weighted-average common shares outstanding-diluted (in shares)	52,820	52,288	52,813	52,280
Dividends declared and paid per common share (in dollars per share)	$0.04	$0.04	$0.08	$0.08

Consolidated_Statements_of_Com

Consolidated Statements of Comprehensive Income (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$49,516	$80,191	$128,559	$156,523
Other Comprehensive Income (Loss), Net of Tax [Abstract]	'	'	'	'
Foreign currency translation adjustment	3,279	4,093	2,770	-329
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	2,831	49	5,662	99
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Net of Tax	-1,759	-1,603	-3,518	-3,205
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax, Portion Attributable to Parent	1,072	-1,554	2,144	-3,106
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net	0	96	-235	-5
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	-51	-20	-36	-32
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax	-51	76	-271	-37
Total other comprehensive income (loss)	4,300	2,615	4,643	-3,472
Total comprehensive income	$53,816	$82,806	$133,202	$153,051

Consolidated_Statements_of_Com1

Consolidated Statements of Comprehensive Income Parenthetical (Parentheticals) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2013	Dec. 31, 2011
Pension and postretirement adjustments, income taxes	($1,700)	'	($30)	($3,400)	'
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Net Prior Service Cost (Credit), Tax	-1,056	-987	'	-2,113	-1,974
Unrealized gain on cash flow hedge, tax	0	'	-59	140	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Tax	$29	$12	'	$20	$20

Consolidated_Statements_of_Cas

Consolidated Statements of Cash Flows (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating Activities	'	'
Net income	$128,559	$156,523
Adjustments to reconcile net income to net cash provided by operating activities:	'	'
Depreciation and amortization	76,178	63,813
Amortization of acquired contract liabilities	-20,115	-13,555
Accretion of debt discount	292	268
Other amortization included in interest expense	2,143	1,811
Provision for doubtful accounts receivable	1,239	1,605
Provision for deferred income taxes	63,710	91,071
Employee stock-based compensation	2,263	3,162
Changes in assets and liabilities, excluding the effects of acquisitions and dispositions of businesses:	'	'
Trade and other receivables	16,204	41,642
Rotable assets	-3,319	-1,176
Inventories	-87,371	-73,489
Prepaid expenses and other current assets	4,547	-4,982
Accounts payable, accrued expenses and other current liabilities	-66,181	-60,600
Accrued pension and other postretirement benefits	-70,040	-73,391
Other	4,487	-213
Net cash provided by operating activities	43,622	132,915
Investing Activities	'	'
Capital expenditures	-119,265	-61,193
Reimbursement Revenue	5,037	2,028
Proceeds from sale of assets	11,713	460
Acquisitions, net of cash acquired	-31,329	0
Net cash used in investing activities	-133,844	-58,705
Financing Activities	'	'
Net increase in revolving credit facility	186,606	-81,709
Proceeds from issuance of long-term debt	48,588	71,099
Repayment of debt and capital lease obligations	-148,226	-55,853
Payment of deferred financing costs	-472	-2,244
Dividends paid	-4,149	-3,997
Proceeds on government grant	100	1,000
Repurchase of restricted shares for minimum tax obligation	-2,726	-1,840
Proceeds from exercise of stock options	180	270
Net cash used in financing activities	79,901	-73,274
Effect of exchange rate changes on cash	727	53
Net change in cash	-9,594	989
Cash at beginning of period	32,037	29,662
Cash at end of period	$22,443	$30,651

Consolidated_Statements_of_Cas1

Consolidated Statements of Cash Flows Parenthetical (Parentheticals) (USD $)	6 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2011
Excess tax benefit	$0	$0

BASIS_OF_PRESENTATION_AND_ORGA

BASIS OF PRESENTATION AND ORGANIZATION	6 Months Ended
	Sep. 30, 2013
Organization, Consolidation and Presentation of Financial Statements [Abstract]	'
Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]	'
	BASIS OF PRESENTATION AND ORGANIZATION
	The accompanying unaudited consolidated financial statements of Triumph Group, Inc. (the “Company”) have been prepared in conformity with accounting principles generally accepted in the United States (“U.S. GAAP”) for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, the interim financial information includes all adjustments of a normal recurring nature necessary for a fair presentation of the results of operations, financial position and cash flows. The results of operations for the three and six months ended September 30, 2013 are not necessarily indicative of results that may be expected for the year ending March 31, 2014. The accompanying consolidated financial statements are unaudited and should be read in conjunction with the fiscal 2013 audited consolidated financial statements and notes thereto, included in the Company's Form 10-K for the year ended March 31, 2013 filed in May 2013.
	The Company designs, engineers, manufactures, repairs and overhauls a broad portfolio of aerostructures, aircraft components, accessories, subassemblies and systems. The Company serves a broad, worldwide spectrum of the aviation industry, including original equipment manufacturers of commercial, regional, business and military aircraft and aircraft components, as well as commercial and regional airlines and air cargo carriers.
	Effective April 1, 2013, the Company prospectively adopted accounting guidance requiring disclosure of items reclassified from other comprehensive income (loss) to net income by their respective income statement line item. For items not reclassified to net income in their entirety, the Company is required to reference other disclosures that provide greater detail about these reclassifications. Refer to "Note 12 Stockholders' Equity" of this Form 10-Q for further information. Other than the additional disclosures, the adoption of the guidance did not have an impact on the Company's financial statements.

SUMMARY_OF_SIGNIFICANT_ACCOUNT

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	6 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	'
	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
	Use of Estimates
	The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
	Revenue Recognition
	Revenues are generally recognized in accordance with the contract terms when products are shipped, delivery has occurred or services have been rendered, pricing is fixed and determinable, and collection is reasonably assured. A significant portion of the Company’s contracts are within the scope of the Revenue - Construction-Type and Production-Type Contracts topic of the Accounting Standards Codification (“ASC”) and revenue and costs on contracts are recognized using the percentage-of-completion method of accounting. Accounting for the revenue and profit on a contract requires estimates of (1) the contract value or total contract revenue, (2) the total costs at completion, which is equal to the sum of the actual incurred costs to date on the contract and the estimated costs to complete the contract’s scope of work and (3) the measurement of progress towards completion. Depending on the contract, the Company measures progress toward completion using either the cost-to-cost method or the units-of-delivery method of accounting, with the great majority measured under the units-of-delivery method of accounting.
	•	Under the cost-to-cost method of accounting, progress toward completion is measured as the ratio of total costs incurred to estimated total costs at completion. Costs are recognized as incurred. Profit is determined based on estimated profit margin on the contract multiplied by the progress toward completion. Revenue represents the sum of costs and profit on the contract for the period.
	•	Under the units-of-delivery method of accounting, revenue on a contract is recorded as the units are delivered and accepted during the period at an amount equal to the contractual selling price of those units. The costs recorded on a contract under the units-of-delivery method of accounting are equal to the total costs at completion divided by the total units to be delivered. As contracts can span multiple years, the Company often segments the contracts into production lots for the purposes of accumulating and allocating cost. Profit is recognized as the difference between revenue for the units delivered and the estimated costs for the units delivered.
	Adjustments to original estimates for a contract’s revenues, estimated costs at completion and estimated total profit are often required as work progresses under a contract, as experience is gained and as more information is obtained, even though the scope of work required under the contract may not change, or if contract modifications occur. These estimates are also sensitive to the assumed rate of production. Generally, the longer it takes to complete the contract quantity, the more relative overhead that contract will absorb. The impact of revisions in cost estimates is recognized on a cumulative catch-up basis in the period in which the revisions are made. Provisions for anticipated losses on contracts are recorded in the period in which they become evident (‘‘forward losses’’) and are first offset against costs that are included in inventory, with any remaining amount reflected in accrued contract liabilities in accordance with the Construction-Type and Production-Type Contracts topic. Revisions in contract estimates, if significant, can materially affect results of operations and cash flows, as well as valuation of inventory. Furthermore, certain contracts are combined or segmented for revenue recognition in accordance with the Construction-Type and Production-Type Contracts topic.
	For the three months ended September 30, 2013, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(25,364), $(17,287) and $(0.33) net of tax, respectively. The cumulative catch-up adjustments to operating income for the three months ended September 30, 2013 included gross favorable adjustments of approximately $9,783 and gross unfavorable adjustments of approximately $(35,147). For the six months ended September 30, 2013, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(23,005), $(15,222) and $(0.29) net of tax, respectively. The cumulative catch-up adjustments to operating income for the six months ended September 30, 2013 included gross favorable adjustments of approximately $11,421 and gross unfavorable adjustments of approximately $(34,426). For the three months ended September 30, 2012, cumulative catch-up adjustments from changes in estimates increased operating income, net income and earnings per share by approximately $158, $100 and $0.00 net of tax, respectively. For the six months ended September 30, 2012, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(4,791), $(3,000) and $(0.06) net of tax, respectively.
	Amounts representing contract change orders or claims are only included in revenue when such change orders or claims have been settled with the customer and to the extent that units have been delivered. Additionally, some contracts may contain provisions for revenue sharing, price re-determination, requests for equitable adjustments, change orders or cost and/or performance incentives. Such amounts or incentives are included in contract value when the amounts can be reliably estimated and their realization is reasonably assured.
	Although fixed-price contracts, which extend several years into the future, generally permit the Company to keep unexpected profits if costs are less than projected, the Company also bears the risk that increased or unexpected costs may reduce profit or cause the Company to sustain losses on the contract. In a fixed-price contract, the Company must fully absorb cost overruns, notwithstanding the difficulty of estimating all of the costs the Company will incur in performing these contracts and in projecting the ultimate level of revenue that may otherwise be achieved.
	Failure to anticipate technical problems, estimate delivery reductions, estimate costs accurately or control costs during performance of a fixed-price contract may reduce the profitability of a fixed-price contract or cause a loss. The Company believes that it has recognized adequate provisions in the financial statements for losses on fixed-price contracts, but cannot be certain that the contract loss provisions will be adequate to cover all actual future losses.
	While the Company is currently projecting its recurring production contracts to be profitable, there is still a substantial amount of risk similar to what the Company has experienced on certain programs (such as 747-8). Particularly, the Company's ability to manage risks related to supplier performance, execution of cost reduction strategies, hiring and retaining skilled production and management personnel, quality and manufacturing execution, program schedule delays and many other risks, will determine the ultimate performance of these programs.
	The next twelve months will be critical time for these programs as the Company attempts to return to baseline performance for the recurring cost structure. Recognition of forward-losses in the future periods continues to be a significant risk and will depend upon several factors including the Company's market forecast, possible airplane program delays, the Company's ability to successfully perform under revised design and manufacturing plans, achievement of forecasted cost reductions as the Company continues production and the ability to successfully resolve claims and assertions with the Company's customers and suppliers.
	Included in net sales of the Aerostructures Group is the non-cash amortization of acquired contract liabilities recognized as fair value adjustments through purchase accounting of the acquisition of Vought Aircraft Industries, Inc. ("Vought") on June 16, 2010. For the three months ended September 30, 2013 and 2012, the Company recognized $5,614 and $6,563, respectively, into net sales in the accompanying consolidated statements of income. For the six months ended September 30, 2013 and 2012, the Company recognized $11,755 and $13,555, respectively, into net sales in the accompanying consolidated statements of income.
	Included in net sales of the Aerospace Systems Group is the non-cash amortization of acquired contract liabilities recognized as fair value adjustments through provisional purchase accounting of the acquisition of Goodrich Corporation (Goodrich Pump & Engine Control Systems) ("GPECS") on March 18, 2013. For the three and six months ended September 30, 2013, the Company recognized $3,351 and $8,360, respectively, into net sales in the accompanying consolidated statements of income.
	The Aftermarket Services Group provides repair and overhaul services, a small portion of which services are provided under long-term power-by-the-hour contracts. The Company applies the proportional performance method of accounting to recognize revenue under these contracts. Revenue is recognized over the contract period as units are delivered based on the relative value in proportion to the total estimated contract consideration. In estimating the total contract consideration, management evaluates the projected utilization of its customers’ fleet over the term of the contract, in connection with the related estimated repair and overhaul servicing requirements to the fleet based on such utilization. Changes in utilization of the fleet by customers, among other factors, may have an impact on these estimates and require adjustments to estimates of revenue to be realized.
	Concentration of Credit Risk
	The Company’s trade accounts receivable are exposed to credit risk. However, the risk is limited due to the diversity of the customer base and the customer base’s wide geographical area. Trade accounts receivable from The Boeing Company (“Boeing”) (representing commercial, military and space) represented approximately 32.3% and 32.0% of total trade accounts receivable as of September 30, 2013 and March 31, 2013, respectively. The Company had no other concentrations of credit risk of more than 10%. Sales to Boeing for the six months ended September 30, 2013 were $880,078, or 46% of net sales, of which $827,116, $41,561 and $11,401 were from the Aerostructures segment, the Aerospace Systems segment and Aftermarket Services segment, respectively. Sales to Boeing for the six months ended September 30, 2012 were $899,302, or 49% of net sales, of which $847,982, $35,974 and $15,346 were from the Aerostructures segment, the Aerospace Systems segment and Aftermarket Services segment, respectively. No other single customer accounted for more than 10% of the Company’s net sales. However, the loss of any significant customer, including Boeing, could have a material adverse effect on the Company and its operating subsidiaries.
	Stock-Based Compensation
	The Company recognizes compensation expense for share-based awards based on the fair value of those awards at the date of grant. Stock-based compensation expense for the three months ended September 30, 2013 and 2012 was $935 and $1,631, respectively. Stock-based compensation expense for the six months ended September 30, 2013 and 2012 was $2,263 and $3,162, respectively. The stock-based compensation expense decreased for the three months and six months ended September 30, 2013, respectively, as compared to the three months and six months ended September 30, 2012, respectively, due to decreased performance. The Company has classified share-based compensation within selling, general and administrative expenses to correspond with the same line item as the majority of the cash compensation paid to employees. Upon the exercise of stock options or vesting of restricted stock, the Company first transfers treasury stock, then issues new shares.
	Intangible Assets
	The components of intangible assets, net, are as follows:
		September 30, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	595,956		$	(118,106	)	$	477,850
	Product rights, technology and licenses	11.7		56,876			(30,503		)	26,373
	Non-compete agreements and other	9.9		1,705			(1,296		)	409
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,092,937		$	(149,905	)	$	943,032
		March 31, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	588,761		$	(98,483	)	$	490,278
	Product rights and licenses	11.3		56,876			(27,775		)	29,101
	Non-compete agreements and other	8.8		2,205			(1,625		)	580
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,086,242		$	(127,883	)	$	958,359
	Amortization expense for the three months ended September 30, 2013 and 2012 was $10,617 and $8,556, respectively. Amortization expense for the six months ended September 30, 2013 and 2012 was $22,150 and $17,123, respectively.
	Warranty Reserves
	A reserve has been established to provide for the estimated future cost of warranties on our delivered products. The Company periodically reviews the reserves and adjustments are made accordingly. A provision for warranty on products delivered is made on the basis of historical experience and identified warranty issues. Warranties cover such factors as non-conformance to specifications and defects in material and workmanship. The majority of the Company's agreements include a three-year warranty, although certain programs have warranties up to 20 years.
	The following is a roll-forward of the warranty reserves for the six months ended September 30, 2013 and 2012, respectively:
			2013			2012
	Balance, March 31		$	21,775		$	14,473
	Charges (credits) to costs and expenses		5,074			50
	Write-offs, net of recoveries		(3,508		)	(1,276		)
	Exchange rate changes		16			(9		)
	Balance, September 30		$	23,357		$	13,238
	Supplemental Cash Flow Information
	The Company paid $1,370 and $2,840 for income taxes, net of refunds received, for the six months ended September 30, 2013 and 2012, respectively. The Company made interest payments of $30,110 and $31,755 for the six months ended September 30, 2013 and 2012, respectively.
	During the six months ended September 30, 2013 and 2012, the Company financed $36 and $25 of property and equipment additions through capital leases, respectively. During the six months ended September 30, 2013 and 2012, the Company issued 1,849,596 and 386,936 shares, respectively, in connection with certain redemptions of convertible senior subordinated notes (see Note 6).

ACQUISITIONS

ACQUISITIONS	6 Months Ended
	Sep. 30, 2013
Business Combinations [Abstract]	'
ACQUISITIONS	'
	ACQUISITIONS
	Acquisition of Primus Composites
	Effective May 6, 2013, the Company acquired four related entities collectively comprising the Primus Composites ("Primus") business from Precision Castparts Corp. The acquired business, which includes two manufacturing facilities in Farnborough, England and Rayong, Thailand, will operate as Triumph Structures - Farnborough and Triumph Structures - Thailand and be included in the Aerostructures Group. Together, Triumph Structures - Farnborough and Triumph Structures - Thailand constitute a global supplier of composite and metallic propulsion and structural composites and assemblies. In addition to its composite operations, the Thailand operation also machines and processes metal components.
	The purchase price for the Primus acquisition was $33,530 in cash and $30,000 in assumed debt settled at closing. Goodwill in the amount of $21,202 was recognized for this acquisition and is calculated as the excess of consideration transferred over the net assets recognized and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized such as assembled workforce. The goodwill is not deductible for tax purposes. The Company has also identified intangible assets related to customer relationships valued at approximately $6,426 with a weighted-average life of 16.0 years.
	The accounting for a business combination is dependent upon obtaining valuations and other information for certain assets and liabilities which have not yet been completed or obtained to a point where definitive estimates can be made. The process for estimating the fair values of identified intangible assets, certain tangible assets and assumed liabilities require the use of judgment to determine the appropriate assumptions.
	As the Company finalizes estimates of the fair value of assets acquired and liabilities assumed, substantially all of the purchase price allocation for Primus is provisional. Additional purchase price adjustments will be recorded during the measurement period not to exceed one year beyond the acquisition date. These adjustments may have a material impact on the Company's results of operations and financial position.
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with Accounting Standards Codification Topic 805, Business Combinations ("ASC 805"). The Company is awaiting final appraisal of tangible assets, intangible assets and certain contingent liabilities related to the Primus acquisition. Accordingly, the Company has adjusted the value of intangible assets and property and equipment to draft appraisals. During the six months ended September 30, 2013, the Company recognized an increase of $2,258 in the provisional value of the intangible asset and a decrease of $17,819 in the provisional value of property and equipment as a result of changes in fair value. These purchase price adjustments increased the provisionally recognized goodwill by $15,670 and have been reflected in the accompanying Consolidated Balance Sheet as of September 30, 2013. The effect on net income for the six months ended September 30, 2013 was not material. The allocation of the purchase price of the Primus acquisition is not complete and the amounts below report the Company's best estimate of the fair value based on the information available at this time:
		May 6, 2013
	Cash	$	2,201
	Accounts receivable	17,349
	Inventory	19,102
	Prepaid expenses and other	883
	Property and equipment	29,425
	Goodwill	21,202
	Intangibles assets	6,426
	Other noncurrent assets	5,537
	Total assets	$	102,125
	Accounts payable	$	10,027
	Accrued expenses	23,804
	Deferred taxes	4,764
	Total liabilities	$	38,595
	The provisional amounts recognized are based on the Company's best estimates using information that it has obtained as of the reporting date. The Company will finalize its estimates once it is able to determine that it has obtained all necessary information that existed as of the acquisition date related to these matters or one year following the acquisition of Primus, whichever is earlier.
	The Primus acquisition has been accounted for under the acquisition method and, accordingly, is included in the consolidated financial statements from the effective date of acquisition. The Primus acquisition was funded by the Company's long-term borrowings in place at the date of acquisition. The Company incurred $1,605 in acquisition-related costs in connection with the Primus acquisition, which is recorded in selling, general and administrative expenses in the accompanying Consolidated Statements of Income.
	The following table presents information for the Primus acquisition that is included in the Company's Consolidated Statement of Income from May 6, 2013 through the end of the quarter:
		For the Three Months Ended September 30, 2013			For the Six Months Ended September 30, 2013
	Net sales	$	15,876		$	27,214
	Operating income	(1,633		)	(2,570		)
	FISCAL 2013 ACQUISTIONS
	Acquisition of Goodrich Corporation (Goodrich Pump & Engine Control Systems)
	Effective March 18, 2013, a wholly-owned subsidiary of the Company, Triumph Engine Control Systems, LLC, acquired the assets of Goodrich Corporation (Goodrich Pump & Engine Control Systems) ("GPECS"), a leading independent aerospace fuel system supplier for the commercial, military, helicopter and business jet markets. The acquisition of GPECS provides new capabilities in a market where the Company does not currently participate and further diversifies its customer base in electronic engine controls, fuel metering units and main fuel pumps for both OE and aftermarket/spares end markets. The results for Triumph Engine Control Systems, LLC are included in the Aerospace Systems Group segment from the date of acquisition.
	The purchase price for the GPECS acquisition was $208,650. Goodwill in the amount of $94,563 was recognized for this acquisition and is calculated as the excess of consideration transferred over the net assets recognized and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized such as assembled workforce. The goodwill is deductible for tax purposes. The Company has also identified intangible assets valued at approximately $109,100 with a weighted-average life of 18.2 years.
	The accounting for a business combination is dependent upon obtaining valuations and other information for certain assets and liabilities which have not yet been completed or obtained to a point where definitive estimates can be made. The process for estimating the fair values of identified intangible assets, certain tangible assets and assumed liabilities require the use of judgment to determine the appropriate assumptions.
	As the Company finalizes estimates of the fair value of assets acquired and liabilities assumed, substantially all of the purchase price allocation for GPECS is provisional. Additional purchase price adjustments will be recorded during the measurement period not to exceed one year beyond the acquisition date. These adjustments may have a material impact on the Company's results of operations and financial position.
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with ASC 805. The Company is awaiting final appraisal of tangible assets, intangible assets and certain contingent liabilities related to the GPECS acquisition. Accordingly, the Company has adjusted the value of intangible assets, property and equipment and contingent liabilities to draft appraisals. During the six months ended September 30, 2013, the Company recognized an increase of $29,511 in the provisional value of intangible assets as a result of the recognition of a definite-lived technology intangible asset and changes in the fair value of customer relationships acquired. Additionally, the Company recognized other immaterial adjustments to various assets acquired and liabilities assumed as of the acquisition date. These purchase price adjustments decreased the provisionally recognized goodwill by $28,193 and have been reflected retrospectively as of March 31, 2013 in the accompanying Consolidated Balance Sheet. The effect on net income for the period March 18, 2013 through March 31, 2013 was not material. The allocation of the purchase price of the GPECS acquisition is not complete and the amounts below report the Company's best estimate of the fair value based on the information available at this time:
		March 18, 2013
	Accounts receivable	$	15,888
	Inventory	41,416
	Prepaid expenses and other	568
	Property and equipment	26,906
	Goodwill	94,563
	Intangibles assets	109,100
	Deferred taxes	34,936
	Total assets	$	323,377
	Accounts payable	$	16,000
	Accrued expenses	15,738
	Acquired contract liabilities, net	80,000
	Other noncurrent liabilities	2,989
	Total liabilities	$	114,727
	The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:
		Estimated Useful Life	Estimated Fair Value
	Technology	10 years	$	19,100
	Customer relationships	20 years	90,000
			$	109,100
	Based on the information accumulated to date, the Company's current assessment of the probable outcome of environmental and legal contingencies, the Company has recognized provisional liabilities which resulted in an amount of $2,767. The provisional amounts recognized are based on the Company's best estimates using information that it has obtained as of the reporting date. The Company will finalize its estimates once it is able to determine that it has obtained all necessary information that existed as of the acquisition date related to these matters or one year following the acquisition of GPECS, whichever is earlier.
	The GPECS acquisition has been accounted for under the acquisition method and, accordingly, is included in the consolidated financial statements from the effective date of acquisition. The GPECS acquisition was funded by the Company's long-term borrowings in place at the date of acquisition. The Company incurred $510 for the six months ended September 30, 2013 and $2,936 for the fiscal year ended March 31, 2013 in acquisition-related costs in connection with the GPECS acquisition, which is recorded in selling, general and administrative expenses in the respective Consolidated Statement of Income.
	Acquisition of Embee, Inc.
	Effective December 19, 2012, the Company acquired all of the outstanding shares of Embee, Inc. ("Embee"), renamed Triumph Processing — Embee Division, Inc., which is a leading commercial metal finishing provider offering more than seventy metal finishing, inspecting and testing processes primarily for the aerospace industry. The acquisition of Embee expands the Company's current capabilities to provide comprehensive processing services on precision engineered parts for hydraulics, landing gear, spare parts and electronic actuation systems. The results for Triumph Processing — Embee Division, Inc. are included in the Aerospace Systems Group segment.
	The purchase price for the Embee acquisition was $141,863. Goodwill in the amount of $69,578 was recognized for this acquisition and is calculated as the excess of consideration transferred over the net assets recognized and represents the future economic benefits arising from other assets acquired that could not be individually identified and separately recognized such as assembled workforce. The goodwill is deductible for tax purposes. The Company has also identified intangible assets valued at $55,501 with a weighted-average life of 10.0 years. The Company has recorded its best estimate of the value of the assets and liabilities; however, the allocation of the purchase price for Embee is not complete. The purchase consideration will be finalized upon the settlement of working capital adjustments with the prior owners. The Company is also awaiting final appraisal of tangible assets, intangible assets and certain contingent liabilities related to the Embee acquisition. Accordingly, the Company has adjusted the value of intangible assets, property and equipment and contingent liabilities to draft appraisals. Therefore, the allocation of the purchase price of the Embee acquisition is not complete. The measurement period adjustments recorded during the six months ended September 30, 2013 were not material to the financial statements.
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with ASC 805:
		December 19, 2012
	Cash	$	750
	Accounts receivable	7,013
	Inventory	411
Prepaid expenses and other	517
Property and equipment	14,360
Goodwill	69,578
Intangible assets	55,501
Deferred taxes	455
Other assets	6,738
Total assets	$	155,323
Accounts payable	$	1,591
Accrued expenses	2,309
Other noncurrent liabilities	9,560
Total liabilities	$	13,460
Based on the information accumulated to date, and the Company's current assessment of the probable outcome of environmental contingencies, the Company has recognized a provisional liability and an estimated indemnification asset, which resulted in a net amount of $3,505. The provisional amounts recognized are based on the Company's best estimate using information that it has obtained as of the reporting date. The Company will finalize its estimate once it is able to determine that it has obtained all necessary information that existed as of the acquisition date related to this matter or one year following the acquisition of Embee, whichever is earlier.
The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:
	Estimated Useful Life	Estimated Fair Value
Tradename	Indefinite-lived	$	13,400
Customer relationships	10 years	42,101
		$	55,501
The Embee acquisition has been accounted for under the acquisition method and, accordingly, is included in the consolidated financial statements from the effective date of acquisition. The Embee acquisition was funded by the Company's long-term borrowings in place at the date of acquisition. The Company incurred $82 for the six months ended September 30, 2013 and $805 for the fiscal year ended March 31, 2013 in acquisition-related costs in connection with the Embee acquisition, which is recorded in selling, general and administrative expenses in the respective Consolidated Statement of Income.
The acquisitions of GPECS and Embee are herein referred to as the "fiscal 2013 acquisitions."
The pro forma results presented below include the effects of the Primus acquisition and the fiscal 2013 acquisitions as if they had been consummated as of April 1, 2012. The pro forma results include the amortization associated with an estimate of acquired intangible assets and interest expense on debt to fund these acquisitions, as well as fair value adjustments for property and equipment and off-market contracts. To better reflect the combined operating results, nonrecurring charges directly attributable to the transaction have been excluded. In addition, the pro forma results do not include any expected benefits of the acquisitions. Accordingly, the pro forma results are not necessarily indicative of either future results of operations or results that might have been achieved had the acquisitions been consummated as of April 1, 2012 and have been included in the Company's results of operations for fiscal years 2014 and 2013.
	Three Months Ended September 30,						Six Months Ended September 30,
	2013			2012			2013		2012
Net Sales	$	967,345		$	1,008,698		$	1,916,224	$	1,965,987
Net income	49,516			82,450			129,044		164,340
Earnings per share—basic	$	0.96		$	1.66		$	2.51	$	3.32
Earnings per share—diluted	$	0.94		$	1.58		$	2.44	$	3.14

DISCONTINUED_OPERATIONS_AND_AS

DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE	6 Months Ended
	Sep. 30, 2013
Discontinued Operations and Disposal Groups [Abstract]	'
DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE	'
	4.     DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE
	In April 2013, the Company sold the assets and liabilities of Triumph Instruments - Burbank and Triumph Instruments - Ft. Lauderdale ("Triumph Instruments") for total proceeds of $11,200 including cash received at closing of $9,676, a note of $1,500, and the remaining amount which was held in escrow and received in the second quarter of fiscal 2014, resulting in a loss of $1,462 recognized during the year ended March 31, 2013. The assets and liabilities of Triumph Instruments were classified as held for sale as of March 31, 2013. The loss on the sale of the assets and liabilities of Triumph Instruments is included in the Consolidated Statements of Income within selling, general and administrative expenses for the year ended March 31, 2013. The operating results of Triumph Instruments were included in the Aftermarket Services Group through the date of disposal. The Company expects to have significant continuing involvement in the business and markets of the disposed entities, as defined by ASC 205-20, Discontinued Operations; and, therefore, as a result, the disposal group does not meet the criteria to be classified as discontinued operations.
	To measure the amount of impairment, the Company compared the fair value of assets and liabilities at the evaluation date to the carrying amount at the end of the month prior to the evaluation date. The sale of the Triumph Instruments assets and liabilities are categorized as Level 2 within the fair value hierarchy. The key assumption included the negotiated sales price of the assets and the assumptions of the liabilities (see Note 7 below for definition of levels).
	Assets and liabilities held for sale are comprised of the following:
		31-Mar-13
	Assets held for sale:
	Trade and other receivables, net	$	2,545
	Inventories	7,668
	Rotable assets	1,957
	Property, plant and equipment	2,431
	Other	146
	Total assets held for sale	$	14,747
	Liabilities related to assets held for sale:
	Accounts payable	$	1,515
	Accrued expenses	945
	Other noncurrent liabilities	161
	Total liabilities related to assets held for sale	$	2,621

INVENTORIES

INVENTORIES	6 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
INVENTORIES	'
	INVENTORIES
	Inventories are stated at the lower of cost (average-cost or specific-identification methods) or market. The components of inventories are as follows:
		September 30, 2013			March 31, 2013
	Raw materials	$	83,001		$	70,242
	Work-in-process, including manufactured and purchased components	1,064,644			965,825
	Finished goods	88,481			75,960
	Less: unliquidated progress payments	(140,624		)	(124,128		)
	Total inventories	$	1,095,502		$	987,899
	Work-in-process inventory includes capitalized pre-production costs. Capitalized pre-production costs include nonrecurring engineering, planning and design, including applicable overhead, incurred before production is manufactured on a regular basis. Significant customer-directed work changes can also cause pre-production costs to be incurred. These costs are typically recovered over a contractually determined number of ship set deliveries and the Company believes these amounts will be fully recovered. The balance of capitalized pre-production costs related to the Company's contracts with Bombardier for the Global 7000/8000 program ("Bombardier") and Embraer for the second generation E-Jet ("Embraer") as of September 30, 2013 is $110,885. The balance of capitalized pre-production costs related to the Company's contract with Bombardier as of March 31, 2013 was $71,167.
	The Company is still in the early-development stages for the Bombardier and Embraer programs, as these aircrafts are not scheduled to enter service until 2014 and 2018, respectively, or later. Transition of these programs from development to recurring production levels is dependent upon the success of the programs achieving flight testing and certification, as well as the ability of the Bombardier and Embraer programs to generate acceptable levels of aircraft sales. Failure to achieve these milestones and level of sales or significant cost overruns may result in an impairment of the capitalized pre-production costs.

LONGTERM_DEBT

LONG-TERM DEBT	6 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
LONG-TERM DEBT	'
	LONG-TERM DEBT
	Long-term debt consists of the following:
		September 30, 2013		March 31, 2013
	Revolving credit facility	$	282,455	$	95,849
	Receivable securitization facility	160,300		150,000
	Equipment leasing facility and other capital leases	68,683		61,449
	Secured promissory notes	—		8,741
	Senior subordinated notes due 2017	173,494		173,344
	Senior notes due 2018	348,275		348,133
	Senor notes due 2021	375,000		375,000
	Convertible senior subordinated notes	32,107		109,369
	Other debt	7,978		7,978
		1,448,292		1,329,863
	Less current portion	48,894		133,930
		$	1,399,398	$	1,195,933
	Revolving Credit Facility
	On May 23, 2012, the Company amended and restated its existing credit agreement (the “Credit Facility”) with its lenders to (i) increase the availability under the Credit Facility to $1,000,000, with a $50,000 accordion feature, from $850,000, (ii) extend the maturity date to May 23, 2017, and (iii) amend certain other terms and covenants. In connection with the amendment to the Credit Facility, the Company incurred $2,100 of financing costs. These costs, along with the $7,000 of unamortized financing costs prior to the closing, are being amortized over the remaining term of the Credit Facility.
	On April 5, 2011, in connection with a prior amendment and restatement of the Credit Facility, the Company extinguished its then-outstanding term loan credit agreement (the “Term Loan”) at face value of $350,000, plus accrued interest. As a result, the Company recognized a pre-tax loss on extinguishment of debt of $7,712 associated with the write-off of the remaining unamortized discount and deferred financing fees on the Term Loan included in Interest expense and other for the six months ended September 30, 2011.
	The obligations under the Credit Facility and related documents are secured by liens on substantially all assets of the Company and its domestic subsidiaries pursuant to a Guarantee and Collateral Agreement, dated as of June 16, 2010, among the Company, and the subsidiaries of the Company party thereto. Such liens are pari passu to the liens securing the Company’s obligations under the Term Loan described below pursuant to an intercreditor agreement dated June 16, 2010 among the agents under the Credit Facility and the Term Loan, the Company and its domestic subsidiaries that are borrowers and/or guarantors under the Credit Facility and the Term Loan (the “Intercreditor Agreement”).
	The Credit Facility bears interest at either: (i) LIBOR plus between 1.50% and 2.75%; (ii) the prime rate; or (iii) an overnight rate at the option of the Company. The applicable interest rate is based upon the Company’s ratio of total indebtedness to earnings before interest, taxes, depreciation and amortization. In addition, the Company is required to pay a commitment fee of between 0.30% and 0.50% on the unused portion of the Credit Facility. The Company’s obligations under the Credit Facility are guaranteed by the Company’s domestic subsidiaries.
	At September 30, 2013, there were $282,455 in borrowings and $36,374 in letters of credit outstanding under the Credit Facility primarily to support insurance policies. At March 31, 2013, there were $95,849 in borrowings and $31,415 in letters of credit outstanding under the Credit Facility primarily to support insurance policies. The level of unused borrowing capacity
	6. LONG-TERM DEBT (Continued)
	under the Credit Facility varies from time to time depending in part upon its compliance with financial and other covenants set forth in the related agreement. The Credit Facility contains certain affirmative and negative covenants including limitations on specified levels of indebtedness to earnings before interest, taxes, depreciation and amortization, and interest coverage requirements, and includes limitations on, among other things, liens, mergers, consolidations, sales of assets, and incurrence of debt. If an event of default were to occur under the Credit Facility, the lenders would be entitled to declare all amounts borrowed under it immediately due and payable. The occurrence of an event of default under the Credit Facility could also cause the acceleration of obligations under certain other agreements. The Company is currently in compliance with all such covenants. As of September 30, 2013, the Company had borrowing capacity under this facility of $681,171 after reductions for borrowings and letters of credit outstanding under the facility.
	Receivables Securitization Facility
	In February 2013, the Company amended its $175,000 receivable securitization facility (the “Securitization Facility”) extending the term through February 2016. In connection with the Securitization Facility, the Company sells on a revolving basis certain trade accounts receivable to Triumph Receivables, LLC, a wholly-owned special-purpose entity, which in turn sells a percentage ownership interest in the receivables to commercial paper conduits sponsored by financial institutions. The Company is the servicer of the trade accounts receivable under the Securitization Facility. As of September 30, 2013, the maximum amount available under the Securitization Facility was $175,000. Interest rates are based on prevailing market rates for short-term commercial paper, plus a program fee and a commitment fee. The program fee is 0.43% on the amount outstanding under the Securitization Facility. Additionally, the commitment fee is 0.43% on 100.00% of the maximum amount available under the Securitization Facility. At September 30, 2013, there was $160,300 outstanding under the Securitization Facility. In connection with amending the Securitization Facility, the Company incurred approximately $196 of financing costs. These costs, along with the $537 of unamortized financing costs prior to the amendment, are being amortized over the life of the Securitization Facility. The Company securitizes its trade accounts receivable, which are generally non-interest bearing, in transactions that are accounted for as borrowings pursuant to the Transfers and Servicing topic of the Accounting Standards Codification.
	The agreement governing the Securitization Facility contains restrictions and covenants which include limitations on the making of certain restricted payments, creation of certain liens, and certain corporate acts such as mergers, consolidations and the sale of substantially all assets.
	Capital Leases
	During the six months ended September 30, 2013 and 2012, the Company entered into new capital leases in the amount of $36 and $25, respectively, to finance a portion of the Company’s capital additions for the period. During the six months ended September 30, 2013 and 2012, the Company obtained financing for existing fixed assets in the amount of $15,688 and $11,199, respectively.
	Senior Subordinated Notes Due 2017
	On November 16, 2009, the Company issued $175,000 principal amount of 8.00% Senior Subordinated Notes due 2017 (the “2017 Notes”).  The 2017 Notes were sold at 98.56% of principal amount and have an effective interest yield of 8.25%. Interest on the 2017 Notes is payable semiannually in cash in arrears on May 15 and November 15 of each year. In connection with the issuance of the 2017 Notes, the Company incurred approximately $4,390 of costs, which were deferred and are being amortized on the effective interest method over the term of the 2017 Notes.
	The 2017 Notes are senior subordinated unsecured obligations of the Company and rank subordinate to all of the existing and future senior indebtedness of the Company and the Guarantor Subsidiaries (as defined below), including borrowings under the Credit Facility, and pari passu with the Company’s and the Guarantor Subsidiaries’ existing and future senior subordinated indebtedness. The 2017 Notes are guaranteed, on a full, joint and several basis, by each of the Company’s domestic restricted
	6. LONG-TERM DEBT (Continued)
	subsidiaries that guarantees any of the Company’s debt or that of any of the Company’s restricted subsidiaries under the Credit Facility, and in the future by any domestic restricted subsidiaries that guarantee any of the Company’s debt or that of any of the Company’s domestic restricted subsidiaries incurred under any credit facility (collectively, the “Guarantor Subsidiaries”), in each case on a senior subordinated basis.  If the Company is unable to make payments on the 2017 Notes when they are due, each of the Guarantor Subsidiaries would be obligated to make such payments.
	The Company has the option to redeem all or a portion of the 2017 Notes at any time prior to November 15, 2013 at a redemption price equal to 100% of the principal amount of the 2017 Notes redeemed, plus an applicable premium set forth in the Indenture for the 2017 Notes and accrued and unpaid interest, if any.  The 2017 Notes are also subject to redemption, in whole or in part, at any time on or after November 15, 2013, at redemption prices equal to (i) 104% of the principal amount of the 2017 Notes redeemed, if redeemed prior to November 15, 2014, (ii) 102% of the principal amount of the 2017 Notes redeemed, if redeemed prior to November 15, 2015, and (iii) 100% of the principal amount of the 2017 Notes redeemed, if redeemed thereafter, plus accrued and unpaid interest.
	Upon the occurrence of a change-of-control, the Company must offer to purchase the 2017 Notes from holders at 101% of their principal amount plus accrued and unpaid interest, if any, to the date of purchase.
	The Indenture for the 2017 Notes contains covenants that, among other things, limit the Company’s ability, and the ability of any of the Guarantor Subsidiaries, to (i) grant liens on its assets, (ii) make dividend payments, other distributions or other restricted payments, (iii) incur restrictions on the ability of the Guarantor Subsidiaries to pay dividends or make other payments, (iv) enter into sale and leaseback transactions, (v) merge, consolidate, transfer or dispose of substantially all of their assets, (vi) incur additional indebtedness, (vii) use the proceeds from sales of assets, including capital stock of restricted subsidiaries, and (viii) enter into transactions with affiliates. The Company is currently in compliance with all such covenants.
	On October 10, 2013, the Company exercised its option to redeem the 2017 Notes and the Trustee for the 2017 Notes delivered a Notice of Redemption to the noteholders. The redemption date is November 15, 2013. The principal amount of $175,000 will be redeemed at a price of 104% plus accrued and unpaid interest. As a result of the redemption, the Company will record a charge in the third quarter of fiscal 2014 of approximately $11,000, consisting of early termination premium, unamortized discount and deferred financing fees.
	Senior Notes Due 2018
	On June 16, 2010, in connection with the acquisition of Vought, the Company issued $350,000 principal amount of 8.63% Senior Notes due 2018 (the “2018 Notes”). The 2018 Notes were sold at 99.27% of principal amount and have an effective interest yield of 8.75%. Interest on the 2018 Notes accrues at the rate of 8.63% per annum and is payable semiannually in cash in arrears on January 15 and July 15 of each year. In connection with the issuance of the 2018 Notes, the Company incurred approximately $7,307 of costs, which were deferred and are being amortized on the effective interest method over the term of the 2018 Notes.
	The 2018 Notes are the Company’s senior unsecured obligations and rank equally in right of payment with all of its other existing and future senior unsecured indebtedness and senior in right of payment to all of its existing and future subordinated indebtedness. The 2018 Notes are guaranteed on a full, joint and several basis by each of the Guarantor Subsidiaries.
	The Company may redeem some or all of the 2018 Notes prior to July 15, 2014 by paying a “make-whole” premium. The Company may redeem some or all of the 2018 Notes on or after July 15, 2014 at specified redemption prices.
	6. LONG-TERM DEBT (Continued)
	The Company is obligated to offer to repurchase the 2018 Notes at a price of (a) 101% of their principal amount plus accrued and unpaid interest, if any, as a result of certain change-of-control events and (b) 100% of their principal amount plus accrued and unpaid interest, if any, in the event of certain asset sales. These restrictions and prohibitions are subject to certain qualifications and exceptions.
	The Indenture for the 2018 Notes contains covenants that, among other things, limit the Company’s ability and the ability of any of the Guarantor Subsidiaries to (i) grant liens on its assets, (ii) make dividend payments, other distributions or other restricted payments, (iii) incur restrictions on the ability of the Guarantor Subsidiaries to pay dividends or make other payments, (iv) enter into sale and leaseback transactions, (v) merge, consolidate, transfer or dispose of substantially all of their assets, (vi) incur additional indebtedness, (vii) use the proceeds from sales of assets, including capital stock of restricted subsidiaries, and (viii) enter into transactions with affiliates. The Company is currently in compliance with all such covenants.
	Senior Notes Due 2021
	On February 26, 2013, the Company issued $375,000 principal amount of 4.875% Senior Notes due 2021 (the "2021 Notes"). The 2021 Notes were sold at 100% of principal amount and have an effective interest yield of 4.875%. Interest on the Notes accrues at the rate of 4.875% per annum and is payable semiannually in cash in arrears on April 1 and October 1 of each year, commencing on October 1, 2013. In connection with the issuance of the 2021 Notes, the Company incurred approximately $6,327 of costs, which were deferred and are being amortized on the effective interest method over the term of the 2021 Notes.
	The 2021 Notes are the Company's senior unsecured obligations and rank equally in right of payment with all of its other existing and future senior unsecured indebtedness and senior in right of payment to all of its existing and future subordinated indebtedness. The 2021 Notes are guaranteed on a full, joint and several basis by each of the Guarantor Subsidiaries.
	The Company may redeem some or all of the 2021 Notes prior to April 1, 2017 by paying a "make-whole" premium. The Company may redeem some or all of the 2021 Notes on or after April 1, 2017 at specified redemption prices. In addition, prior to April 1, 2016, the Company may redeem up to 35% of the 2021 Notes with the net proceeds of certain equity offerings at a redemption price equal to 104.875% of the aggregate principal amount plus accrued and unpaid interest, if any, subject to certain limitations set forth in the indenture governing the 2021 Notes (the "2021 Indenture").
	The Company is obligated to offer to repurchase the 2021 Notes at a price of (i) 101% of their principal amount plus accrued and unpaid interest, if any, as a result of certain change-of-control events and (ii) 100% of their principal amount plus accrued and unpaid interest, if any, in the event of certain asset sales. These restrictions and prohibitions are subject to certain qualifications and exceptions.
	The 2021 Indenture contains covenants that, among other things, limit the Company's ability and the ability of any of the Guarantor Subsidiaries to (i) grant liens on its assets, (ii) make dividend payments, other distributions or other restricted payments, (iii) incur restrictions on the ability of the Guarantor Subsidiaries to pay dividends or make other payments, (iv) enter into sale and leaseback transactions, (v) merge, consolidate, transfer or dispose of substantially all of their assets, (vi) incur additional indebtedness, (vii) use the proceeds from sales of assets, including capital stock of restricted subsidiaries, and (viii) enter into transactions with affiliates.
	6. LONG-TERM DEBT (Continued)
	Convertible Senior Subordinated Notes
	On September 18, 2006, the Company issued $201,250 in convertible senior subordinated notes (the “Convertible Notes”). The Convertible Notes are direct, unsecured, senior subordinated obligations of the Company, and rank (i) junior in right of payment to all of the Company’s existing and future senior indebtedness, (ii) equal in right of payment with any other future senior subordinated indebtedness, and (iii) senior in right of payment to all subordinated indebtedness.
	The Company received net proceeds from the sale of the Convertible Notes of approximately $194,998 after deducting debt issuance expenses of approximately $6,252. The net proceeds from the sale were used for prepayment of the Company’s then-outstanding senior notes, including a make-whole premium, fees and expenses in connection with the prepayment, and to repay a portion of the outstanding indebtedness under the Company’s then-existing credit facility. Debt issuance costs were fully amortized as of September 30, 2011.
	The Convertible Notes bear interest at a fixed rate of 2.63% per annum, payable in cash semiannually in arrears on each April 1 and October 1. During the period commencing on October 6, 2011 and ending on, but excluding, April 1, 2012 and for each six-month period from October 1 to March 31 or from April 1 to September 30 thereafter, the Company will pay contingent interest during the applicable interest period if the average trading price of a note for the five consecutive trading days ending on the third trading day immediately preceding the first day of the relevant six-month period equals or exceeds 120% of the principal amount of the Convertible Notes. The contingent interest payable per note in respect of any six-month period will equal 0.25% per annum, calculated on the average trading price of a note for the relevant five trading day period. The Company expects that this contingent interest will continue to be payable on principal that remains outstanding. This contingent interest feature represents an embedded derivative. The value of the derivative was not deemed material at September 30, 2013 due to overall market volatility, recent conversions by holders of the Convertible Notes, as well as the Company's ability to call the Convertible Notes at any time after October 6, 2011.
	Prior to fiscal 2011, the Company paid $19,414 to purchase $22,200 in principal amounts of the Convertible Notes.
	The Convertible Notes mature on October 1, 2026, unless earlier redeemed, repurchased or converted. The Company may redeem the Convertible Notes for cash, in whole or in part, at any time on or after October 6, 2011 at a redemption price equal to 100% of the principal amount of the Convertible Notes to be redeemed plus accrued and unpaid interest, including contingent interest and additional amounts, if any, up to but not including the date of redemption. In addition, holders of the Convertible Notes will have the right to require the Company to repurchase for cash all or a portion of their Convertible Notes on October 1, 2016 and 2021, at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased plus accrued and unpaid interest, including contingent interest and additional amounts, if any, up to, but not including, the date of repurchase. On September 2, 2011, the Company submitted a tender offer of repurchase to the holders of the Convertible Notes, expiring October 3, 2011, and no notes were tendered for repurchase. The Convertible Notes are convertible into the Company’s common stock at a rate equal to 36.8359 shares per $1 principal amount of the Convertible Notes (equal to an initial conversion price of approximately $27.15 per share), subject to adjustment as described in the indenture governing the Convertible Notes. Upon conversion, the Company will deliver to the holder surrendering the Convertible Notes for conversion, for each $1 principal amount of Convertible Notes, an amount consisting of cash equal to the lesser of $1 and the Company’s total conversion obligation and, to the extent that the Company’s total conversion obligation exceeds $1, at the Company’s election, cash or shares of the Company’s common stock in respect of the remainder.
	The Convertible Notes are eligible for conversion upon meeting certain conditions as provided in the indenture governing the Convertible Notes. For the periods from January 1, 2011 through September 30, 2013, the Convertible Notes were eligible for conversion. During the fiscal years ended March 31, 2013 and 2012, the Company settled the conversion of $19,286 and $50,395, respectively, in principal value of the Convertible Notes, as requested by the respective holders, with the principal settled in cash and the conversion benefit settled through the issuance of 395,269 and 772,438 shares, respectively. During the six months ended September 30, 2013, the Company settled the conversion of $77,262 in principal value of the Convertible Notes, as requested by the respective holders, with the principal settled in cash and the conversion benefit settled through the issuance of 1,849,596 shares. During September and October 2013, the Company received notice of conversion from holders
	6. LONG-TERM DEBT (Continued)
	of $17,255 in principal value of the Convertible Notes. These conversions were settled in the third quarter of fiscal 2014 with the principal settled in cash and the conversion benefit settled through the issuance of approximately 394,539 shares. In October 2013, the Company delivered a notice to holders of the Convertible Notes to the effect that, for at least 20 trading days during the 30 consecutive trading days preceding September 30, 2013, the closing price of the Company's common stock was greater than or equal to 130% of the conversion price of such notes on the last trading day. Under the terms of the Convertible Notes, the increase in the Company's stock price triggered a provision, which gave holders of the Convertible Notes a put option through December 31, 2013. Accordingly, the balance sheet classification of the Convertible Notes will be short term for as long as the put option remains in effect.
	To be included in the calculation of diluted earnings per share, the average price of the Company’s common stock for the quarter must exceed the conversion price per share of $27.16. The average price of the Company’s common stock for the three months ended September 30, 2013 and 2012 was $77.10 and $60.35, respectively. Therefore, for the three months ended September 30, 2013 and 2012, there were 766,395 and 2,258,303 additional shares, respectively, included in the calculation of diluted earnings per share. The average price of the Company’s common stock for the six months ended September 30, 2013 and 2012 was $77.27 and $60.42, respectively. Therefore, for the six months ended September 30, 2013 and 2012, there were 1,229,710 and 2,357,143 additional shares, respectively, included in the calculation of diluted earnings per share. If the Company undergoes a fundamental change, holders of the Convertible Notes will have the right, subject to certain conditions, to require the Company to repurchase for cash all or a portion of their Convertible Notes at a repurchase price equal to 100% of the principal amount of the Convertible Notes to be repurchased plus accrued and unpaid interest, including contingent interest and additional amounts if an

FAIR_VALUE_MEASUREMENTS

FAIR VALUE MEASUREMENTS

6 Months Ended

Sep. 30, 2013

Fair Value Disclosures [Abstract]

'

FAIR VALUE MEASUREMENTS

'

FAIR VALUE MEASUREMENTS

The Company follows the Fair Value Measurements and Disclosures topic of the ASC, which requires additional disclosures about the Company’s assets and liabilities that are measured at fair value and establishes a fair value hierarchy which requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The standard describes three levels of inputs that may be used to measure fair value:

Level 1.    Unadjusted quoted prices in active markets for identical assets or liabilities

Level 2.

Unadjusted quoted prices in active markets for similar assets or liabilities, or unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active, or inputs other than quoted prices that are observable for the asset or liability

Level 3.    Unobservable inputs for the asset or liability

Recurring Measurements

The following table provides the assets (liabilities) reported at fair value and measured on a recurring basis as of September 30, 2013 and March 31, 2013:

Description

Level

September 30, 2013

March 31, 2013

Contingent consideration

3

$

(1,638

)

$

(2,614

)

Foreign exchange derivative

2

(222

)

209

Non-hedge derivative

2

(102

)

—

7.    FAIR VALUE MEASUREMENTS (Continued)

The fair value of the contingent consideration at the date of the acquisition of Aviation Network Services, LLC was $1,926, which was estimated using the income approach based on significant inputs that are not observable in the market. Key assumptions included a discount rate and probability assessments of each milestone payment being made. The assumptions used to develop the estimate were updated during the six months ended September 30, 2013, based on the underlying earnings projections exceeding initial assumptions. In July 2013, the Company paid the first installment of $1,100 related to this contingent consideration obligation.

Foreign exchange derivatives included in the table above relate to derivative financial instruments that the Company uses to manage its exposure to fluctuations in foreign currency exchange rates. Foreign currency exchange contracts are entered into to manage the exchange rate risk of forecasted foreign currency denominated cash payments. The foreign currency exchange contracts are designated as cash flow hedges. The classification of gains and losses resulting from changes in the fair values of the foreign exchange derivatives is dependent on the intended use of the derivative and its resulting designation. Adjustments to reflect changes in fair values of foreign exchange derivatives attributable to the effective portion of hedges that are considered highly effective hedges are reflected net of income taxes in accumulated other comprehensive income (loss) until the hedged transaction is recognized in earnings. Changes in the fair value of the foreign exchange derivatives that are attributable to the ineffective portion of the hedges, or of cash flow hedge that are not considered to be highly effective hedges, if any, are immediately recognized in earnings. The aggregate notional amount of our outstanding foreign currency exchange contracts at September 30, 2013 was $9,542, with open settlement dates up to September 30, 2014. The amount of ineffectiveness on foreign exchange derivatives is not significant. The Company estimates that approximately $141 of losses presently in accumulated other comprehensive income (loss) will be reclassified into earnings during the next twelve months.

Non-hedge derivatives included in the table above relate to derivative financial instruments that the Company is using to manage its exposure to fluctuations in the Canadian dollar exchange rate as it relates to the acquisition of General Donlee Canada, Inc. (see Note 17). The non-hedge derivative is accounted for at market value with the resulting gains and losses reflected in interest expense and other in the Consolidated Statements of Income. The aggregate notional amount of our outstanding non-hedge derivative contracts at September 30, 2013 was $106,767, with open settlement dates up to November 29, 2013.

The following table represents a rollforward of the balances of our liabilities recorded at fair value that are valued using Level 3 inputs:

March 31, 2013

Net Purchases

Net Realized

Net Unrealized

30-Sep-13

Balance

(Sales), Issues (Settlements)

Appreciation

Appreciation

Balance

(Depreciation)

(Depreciation)

Contingent consideration

$

(2,614

)

$

1,100

$

(124

)

$

—

$

(1,638

)

March 31, 2012

Net Purchases

Net Realized

Net Unrealized

30-Sep-12

Balance

(Sales), Issues (Settlements)

Appreciation

Appreciation

Balance

(Depreciation)

(Depreciation)

Contingent consideration

$

(2,019

)

$

—

$

(452

)

$

—

$

(2,471

)

The following table presents quantitative information for liabilities recorded at fair value using Level 3 inputs:

30-Sep-13

Valuation Technique

Unobservable input

Range

Balance

Contingent consideration

$

(1,638

)

Discounted cash flow

Earnings of acquired company

$0 - $1,900

The Financial Instruments topic of the ASC requires disclosure of the estimated fair value of certain financial instruments. These estimated fair values as of September 30, 2013 and March 31, 2013 have been determined using available market

7.    FAIR VALUE MEASUREMENTS (Continued)

information and appropriate valuation methodologies. Considerable judgment is required to interpret market data to develop estimates of fair value. The estimates presented are not necessarily indicative of amounts the Company could realize in a current market exchange. The use of alternative market assumptions and estimation methodologies could have had a material effect on these estimates of fair value.

Nonrecurring Measurements

The sale of Triumph Instruments assets and liabilities is categorized as Level 2 within the fair value hierarchy (Note 4), as of March 31, 2013.

Financial Instruments Not Recorded at Fair Value

The carrying amounts of certain of our financial instruments, including cash and cash equivalents, accounts receivable and accounts payable, approximate fair value because of their short maturities (Level 1 inputs). Carrying amounts and the related estimated fair values of the Company’s financial instruments not recorded at fair value in the financial statements are as follows:

September 30, 2013

March 31, 2013

Carrying

Fair Value

Carrying

Fair Value

Value

Value

Long-term debt

$

1,448,292

$

1,524,557

$

1,329,863

$

1,594,800

The fair value of the long-term debt was calculated based on interest rates available for debt with terms and maturities similar to the Company’s existing debt arrangements, unless quoted market prices were available (Level 2 inputs).

Except for long-term debt, the Company's financial instruments are highly liquid or have short-term maturities. Therefore, the recorded value is approximately equal to the fair value. The financial instruments held by the Company could potentially expose it to a concentration of credit risk. The Company invests its excess cash in money market funds and other deposit instruments placed with major banks and financial institutions. The Company has established guidelines related to diversification and maturities to maintain safety and liquidity

EARNINGS_PER_SHARE

EARNINGS PER SHARE	6 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
EARNINGS PER SHARE	'
	EARNINGS PER SHARE
	The following is a reconciliation between the weighted-average outstanding shares used in the calculation of basic and diluted earnings per share:
		Three Months Ended September 30,		Six Months Ended September 30,
		(in thousands)		(in thousands)
		2013	2012	2013	2012
	Weighted-average common shares outstanding – basic	51,807	49,657	51,311	49,536
	Net effect of dilutive stock options and nonvested stock	247	373	273	387
	Potential common shares – convertible debt	766	2,258	1,229	2,357
	Weighted-average common shares outstanding – diluted	52,820	52,288	52,813	52,280

INCOME_TAXES

INCOME TAXES	6 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
INCOME TAXES	'
	The Company follows the Income Taxes topic of the ASC, which prescribes a recognition threshold and measurement attribute criteria for the financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return, as well as guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.
	The Company has classified uncertain tax positions as noncurrent income tax liabilities unless expected to be paid in one year. Penalties and tax-related interest expense are reported as a component of income tax expense. As of September 30, 2013 and March 31, 2013, the total amount of accrued income tax-related interest and penalties was $155 and $236, respectively.
	As of September 30, 2013 and March 31, 2013, the total amount of unrecognized tax benefits was $7,850 and $7,728, respectively, of which $6,066 and $5,945, respectively, would impact the effective rate, if recognized. The Company does not anticipate that total unrecognized tax benefits will be reduced in the next 12 months.
	The effective income tax rate for the quarter ended September 30, 2013 was 31.8%, as compared to 36.5% for the quarter ended September 30, 2012. For the three months ended September 30, 2013, the income tax provision was decreased to reflect $2,345 of benefit related to an increase in research and development tax credit carryforward and NOL carryforward. The effective income tax rate for the six months ended September 30, 2013 was 33.8% as compared to 37.4% for the six months ended September 30, 2012. For the six months ended September 30, 2013, the income tax provision was reduced to reflect unrecognized tax benefits of $704 and additional research and development tax credit carryforward and NOL carryforward of $2,345 as discussed above.
	With few exceptions, the Company is no longer subject to U.S. federal income tax examinations for fiscal years ended before March 31, 2009, state or local examinations for fiscal years ended before March 31, 2009, or foreign income tax examinations by tax authorities for fiscal years ended before March 31, 2008.
	As of September 30, 2013, the Company was subject to examination in one state jurisdiction for fiscal years ended March 31, 2009 through March 31, 2011. The Company has filed appeals in a prior state examination related to fiscal years ended March 31, 1999 through March 31, 2005. The fiscal year ended March 31, 2011 is currently being examined by the Internal Revenue Service. Because of net operating losses acquired as part of the acquisition of Vought, the Company is subject to U.S. federal income tax examinations and various state jurisdictions for the years ended December 31, 2004 and after related to previously filed Vought tax returns. The Company believes appropriate provisions for all outstanding issues have been made for all jurisdictions and all open years.

GOODWILL

GOODWILL	6 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
GOODWILL	'
	GOODWILL
	The following is a summary of the changes in the carrying value of goodwill by reportable segment, from March 31, 2013 through September 30, 2013:
		Aerostructures			Aerospace		Aftermarket		Total
					Systems		Services
	Balance, March 31, 2013	$	1,316,450		$	344,964	$	55,986	$	1,717,400
	Goodwill recognized in connection with acquisitions	21,202			—		—		21,202
	Purchase accounting adjustments	33			—		—		33
	Effect of exchange rate changes	(706		)	2,226		—		1,520
	Balance, September 30, 2013	$	1,336,979		$	347,190	$	55,986	$	1,740,155

PENSION_AND_OTHER_POSTRETIREME

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS	6 Months Ended
	Sep. 30, 2013
Compensation and Retirement Disclosure [Abstract]	'
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS	'
	PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS
	The Company sponsors several defined benefit pension plans covering some of its employees. Certain employee groups are ineligible to participate in the plans or have ceased to accrue additional benefits under the plans based upon their service to the Company or years of service accrued under the defined benefit pension plans. Benefits under the defined benefit plans are based on years of service and, for most non-represented employees, on average compensation for certain years. It is the Company’s policy to fund at least the minimum amount required for all qualified plans, using actuarial cost methods and assumptions acceptable under U.S. Government regulations, by making payments into a separate trust.
	In addition to the defined benefit pension plans, the Company provides certain healthcare and life insurance benefits for eligible retired employees. Such benefits are unfunded. Employees achieve eligibility to participate in these contributory plans upon retirement from active service if they meet specified age and years of service requirements. Election to participate for some employees must be made at the date of retirement. Qualifying dependents at the date of retirement are also eligible for medical coverage. Current plan documents reserve the right to amend or terminate the plans at any time, subject to applicable collective bargaining requirements for represented employees. From time to time, changes have been made to the benefits provided to various groups of plan participants. Premiums charged to most retirees for medical coverage prior to age 65 are based on years of service and are adjusted annually for changes in the cost of the plans as determined by an independent actuary. In addition to this medical inflation cost-sharing feature, the plans also have provisions for deductibles, co-payments, coinsurance percentages, out-of-pocket limits, schedules of reasonable fees, preferred provider networks, coordination of benefits with other plans and a Medicare carve-out.
	In accordance with the Compensation – Retirement Benefits topic of the ASC, the Company has recognized the funded status of the benefit obligation as of the date of the last remeasurement, in the accompanying Consolidated Balance Sheets. The funded status is measured as the difference between the fair value of the plan’s assets and the PBO or accumulated postretirement benefit obligation of the plan. In order to recognize the funded status, the Company determined the fair value of the plan assets. The majority of the plan assets are publicly traded investments which were valued based on the market price as of the date of remeasurement. Investments that are not publicly traded were valued based on the estimated fair value of those investments based on our evaluation of data from fund managers and comparable market data.
	Net Periodic Benefit Plan Costs
	The components of net periodic benefit costs for our postretirement benefit plans are shown in the following table:
		Pension benefits
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Components of net periodic benefit expense (income):
	Service cost	$	3,293		$	4,626		$	6,586		$	9,252
	Interest cost	23,216			24,587			46,432			49,174
	Expected return on plan assets	(37,018		)	(34,333		)	(74,036		)	(68,667		)
	Amortization of prior service costs	(1,683		)	(1,458		)	(3,366		)	(2,915		)
	Amortization of net loss	4,531			79			9,062			159
	Special termination benefits	—			1,957			—			3,107
	Net periodic benefit income	$	(7,661	)	$	(4,542	)	$	(15,322	)	$	(9,890	)
	11.     PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Continued)
		Other postretirement benefits
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Components of net periodic benefit expense:
	Service cost	$	765		$	884		$	1,530		$	1,769
	Interest cost	3,138			3,941			6,276			7,881
	Amortization of prior service costs	(1,132		)	(1,133		)	(2,264		)	(2,265		)
	Net periodic benefit expense	$	2,771		$	3,692		$	5,542		$	7,385
	The Company periodically experiences events or makes changes to its benefit plans that result in special charges. Some require remeasurements. The following summarizes the key events whose effects on net periodic benefit costs are included in the tables above:
	•	In April 2012, the Company completed an early retirement incentive offer with a portion of its second largest union-represented group of production and maintenance employees. The early retirement incentive offer provided for an increase in the pension benefits payable to covered employees who retire no later than November 30, 2012. This early retirement incentive resulted in a special termination benefit expense of $1,150 and is presented on the accompanying Consolidated Statements of Income as "Early retirement incentive expense."
	•	In July 2012, the Company completed a similar early retirement incentive offer to its non-represented employee participants. This early retirement incentive provided for an increase in the termination benefits payable through the pension plan to covered employees who retire no later than November 30, 2012. This early retirement incentive resulted in a special termination benefit expense of $1,957 and is presented on the accompanying Consolidated Statements of Income as "Early retirement incentive expense," as well as severance charges of $1,182 included in "Acquisition and integration expenses" on the accompanying Consolidated Statements of Income.

SEGMENTS

SEGMENTS	6 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
SEGMENTS	'
	SEGMENTS
	The Company has three reportable segments: the Aerostructures Group, the Aerospace Systems Group and the Aftermarket Services Group. The Company’s reportable segments are aligned with how the business is managed and the markets that the Company serves are viewed. The Chief Operating Decision Maker (the “CODM”) evaluates performance and allocates resources based upon review of segment information. The CODM utilizes earnings before interest, income taxes, depreciation and amortization (“Adjusted EBITDA”) as a primary measure of segment profitability to evaluate performance of its segments and allocate resources.
	The Aerostructures segment consists of the Company’s operations that manufacture products primarily for the aerospace original equipment manufacturer ("OEM") market. The Aerostructures segment’s revenues are derived from the design, manufacture, assembly and integration of metallic and composite aerostructures and structural components, including aircraft wings, fuselage sections, tail assemblies, engine nacelles, flight control surfaces as well as helicopter cabins. Further, the segment’s operations also design and manufacture composite assemblies for floor panels and environmental control system ducts. These products are sold to various aerospace OEMs on a global basis.
	The Aerospace Systems segment consists of the Company’s operations that also manufacture products primarily for the aerospace OEM market, as well as the related aftermarket. The segment’s operations design and engineer mechanical and electromechanical controls, such as hydraulic systems, main engine gearbox assemblies, accumulators, mechanical control cables and non-structural cockpit components. These products are sold primarily to various aerospace OEMs on a global basis.
	The Aftermarket Services segment consists of the Company’s operations that provide maintenance, repair and overhaul services to both commercial and military markets on components and accessories manufactured by third parties. Maintenance, repair and overhaul revenues are derived from services on auxiliary power units, airframe and engine accessories, including constant-speed drives, cabin compressors, starters and generators, and pneumatic drive units. In addition, the segment’s operations repair and overhaul thrust reversers, nacelle components and flight control surfaces. The segment’s operations also perform repair and overhaul services and supply spare parts for various types of gauges for a broad range of commercial airlines on a worldwide basis.
	Segment Adjusted EBITDA is total segment revenue reduced by operating expenses (less depreciation and amortization) identifiable with that segment. Corporate includes general corporate administrative costs and any other costs not identifiable with one of the Company’s segments, including early retirement incentives, such as $1,957 and $3,107 of special termination benefit expenses for the three and six months ended September 30, 2012.
	The Company does not accumulate net sales information by product or service or groups of similar products and services and, therefore, the Company does not disclose net sales by product or service because to do so would be impracticable. Selected financial information for each reportable segment and the reconciliation of Adjusted EBITDA to operating income is as follows:
	13.     SEGMENTS (Continued)
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Net sales:
	Aerostructures	$	690,748		$	713,978		$	1,342,636		$	1,383,831
	Aerospace systems	205,483			150,139			425,009			290,651
	Aftermarket services	72,971			76,061			147,324			156,038
	Elimination of inter-segment sales	(1,857		)	(1,997		)	(3,941		)	(4,651		)
		$	967,345		$	938,181		$	1,911,028		$	1,825,869
	Income from continuing operations before income taxes:
	Operating income (expense):
	Aerostructures	$	64,425		$	121,385		$	164,812		$	241,523
	Aerospace systems	31,740			25,712			74,383			49,177
	Aftermarket services	10,102			10,767			21,381			22,574
	Corporate	(13,296		)	(14,917		)	(26,259		)	(29,385		)
		92,971			142,947			234,317			283,889
	Interest expense and other	20,321			16,668			40,031			33,900
		$	72,650		$	126,279		$	194,286		$	249,989
	Depreciation and amortization:
	Aerostructures	$	26,483		$	24,049		$	52,796		$	47,953
	Aerospace systems	8,549			4,489			17,088			8,963
	Aftermarket services	1,864			2,288			3,741			4,614
	Corporate	1,348			1,172			2,553			2,283
		$	38,244		$	31,998		$	76,178		$	63,813
	Amortization of acquired contract liabilities, net:
	Aerostructures	$	5,614		$	6,563		$	11,755		$	13,555
	Aerospace systems	3,351			—			8,360			—
		$	8,965		$	6,563		20,115			13,555
	Adjusted EBITDA:
	Aerostructures	$	85,294		$	138,871		$	205,853		$	275,921
	Aerospace systems	36,938			30,201			83,111			58,140
	Aftermarket services	11,966			13,055			25,122			27,188
	Corporate	(11,948		)	(11,788		)	(23,706		)	(23,995		)
		$	122,250		$	170,339		$	290,380		$	337,254
	Capital expenditures:
	Aerostructures	$	52,598		$	16,413		$	98,543		$	46,425
	Aerospace systems	5,843			3,810			10,275			6,599
	Aftermarket services	3,915			3,378			8,066			7,475
	Corporate	680			487			2,381			694
		$	63,036		$	24,088		$	119,265		$	61,193
	13.     SEGMENTS (Continued)
		September 30, 2013			31-Mar-13
	Total Assets:
	Aerostructures	$	3,818,050		$	3,707,527
	Aerospace systems	1,056,257			1,040,821
	Aftermarket services	318,856			327,609
	Corporate	119,111			108,337
		$	5,312,274		$	5,184,294
	During the three months ended September 30, 2013 and 2012, the Company had international sales of $151,146 and $113,468, respectively. During the six months ended September 30, 2013 and 2012, the Company had international sales of $296,237 and $240,579, respectively.

SELECTED_CONSOLIDATING_FINANCI

SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS	6 Months Ended
	Sep. 30, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS	'
	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS
	The 2017 Notes, the 2018 Notes and the 2021 Notes are fully and unconditionally guaranteed on a joint and several basis by the Guarantor Subsidiaries. The total assets, stockholders' equity, revenue, earnings and cash flows from operating activities of the Guarantor Subsidiaries exceeded a majority of the consolidated total of such items as of and for the periods reported. The only consolidated subsidiaries of the Company that are not guarantors of the 2017 Notes, the 2018 Notes and the 2021 Notes (the “Non-Guarantor Subsidiaries”) are: (a) the receivables securitization special-purpose entity; and (b) the international operating subsidiaries. The following tables present condensed consolidating financial statements including the Company (the “Parent”), the Guarantor Subsidiaries, and the Non-Guarantor Subsidiaries. Such financial statements include summary consolidating balance sheets as of September 30, 2013 and March 31, 2013, condensed consolidating statements of comprehensive income for the three and six months ended September 30, 2013 and 2012, and condensed consolidating statements of cash flows for the six months ended September 30, 2013 and 2012.
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	SUMMARY CONSOLIDATING BALANCE SHEETS:
		September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Current assets:
	Cash and cash equivalents	$	3,120		$	818		$	18,505		$	—		$	22,443
	Trade and other receivables, net	1,264			194,246			239,350			—			434,860
	Inventories	—			1,046,062			49,440			—			1,095,502
	Rotable assets	—			24,619			13,553			—			38,172
	Deferred income taxes	51,129			—			11			—			51,140
	Prepaid expenses and other	5,152			10,802			4,118			—			20,072
	Total current assets	60,665			1,276,547			324,977			—			1,662,189
	Property and equipment, net	10,567			805,635			82,429			—			898,631
	Goodwill and other intangible assets, net	—			2,604,946			78,241			—			2,683,187
	Other, net	56,885			8,865			2,517			—			68,267
	Intercompany investments and advances	3,339,235			96,691			5,369			(3,441,295		)	—
	Total assets	$	3,467,352		$	4,792,684		$	493,533		$	(3,441,295	)	$	5,312,274
	Current liabilities:
	Current portion of long-term debt	$	32,360		$	16,534		$	—		$	—		$	48,894
	Accounts payable	—			273,032			17,156			—			290,188
	Accrued expenses	47,400			193,874			23,272			—			264,546
	Total current liabilities	79,760			483,440			40,428			—			603,628
	Long-term debt, less current portion	1,184,969			54,129			160,300			—			1,399,398
	Intercompany advances	—			2,052,759			179,085			(2,231,844		)	—
	Accrued pension and other postretirement benefits, noncurrent	7,376			590,333			—			—			597,709
	Deferred income taxes and other	8,132			511,728			16,845			(12,281		)	524,424
	Total stockholders’ equity	2,187,115			1,100,295			96,875			(1,197,170		)	2,187,115
	Total liabilities and stockholders’ equity	$	3,467,352		$	4,792,684		$	493,533		$	(3,441,295	)	$	5,312,274
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	SUMMARY CONSOLIDATING BALANCE SHEETS:
		March 31, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Current assets:
	Cash and cash equivalents	$	3,110		$	1,537		$	27,390		$	—		$	32,037
	Trade and other receivables, net	1,141			171,186			261,657			—			433,984
	Inventories	—			957,077			30,822			—			987,899
	Rotable assets	—			24,903			9,950			—			34,853
	Deferred income taxes	—			99,546			—			—			99,546
	Prepaid expenses and other	5,533			15,170			2,890			—			23,593
	Assets held for sale	—			14,747			—			—			14,747
	Total current assets	9,784			1,284,166			332,709			—			1,626,659
	Property and equipment, net	9,999			753,510			51,575			—			815,084
	Goodwill and other intangible assets, net	335			2,629,908			45,516			—			2,675,759
	Other, net	58,526			7,873			393			—			66,792
	Intercompany investments and advances	3,137,667			325,786			2,777			(3,466,230		)	—
	Total assets	$	3,216,311		$	5,001,243		$	432,970		$	(3,466,230	)	$	5,184,294
	Current liabilities:
	Current portion of long-term debt	$	109,648		$	24,282		$	—		$	—		$	133,930
	Accounts payable	9,400			309,363			8,663			—			327,426
	Accrued expenses	35,894			231,260			9,514			—			276,668
	Liabilities related to assets held for sale	—			2,621			—			—			2,621
	Total current liabilities	154,942			567,526			18,177			—			740,645
	Long-term debt, less current portion	998,200			47,733			150,000			—			1,195,933
	Intercompany advances	—			2,193,874			202,621			(2,396,495		)	—
	Accrued pension and other postretirement benefits, noncurrent	7,264			663,911			—			—			671,175
	Deferred income taxes and other	10,747			521,885			—			(1,249		)	531,383
	Total stockholders’ equity	2,045,158			1,006,314			62,172			(1,068,486		)	2,045,158
	Total liabilities and stockholders’ equity	$	3,216,311		$	5,001,243		$	432,970		$	(3,466,230	)	$	5,184,294
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
	Three Months Ended September 30, 2013
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net sales	$	—		$	924,624		$	44,080		$	(1,359	)	$	967,345
Operating costs and expenses:
Cost of sales	—			736,898			35,779			(1,359		)	771,318
Selling, general and administrative	10,185			46,740			6,658			—			63,583
Depreciation and amortization	788			35,429			2,027			—			38,244
Relocation costs	—			1,229			—			—			1,229
	10,973			820,296			44,464			(1,359		)	874,374
Operating (loss) income	(10,973		)	104,328			(384		)	—			92,971
Intercompany interest and charges	(53,356		)	52,101			1,255			—			—
Interest expense and other	19,304			1,833			(816		)	—			20,321
Income (loss) before income taxes	23,079			50,394			(823		)	—			72,650
Income tax expense	3,140			19,890			104			—			23,134
Net income (loss)	19,939			30,504			(927		)	—			49,516
Other comprehensive income	—			1,021			3,279			—			4,300
Total comprehensive income	$	19,939		$	31,525		$	2,352		$	—		$	53,816
14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
	Three Months Ended September 30, 2012
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net sales	$	—		$	914,943		$	24,274		$	(1,036	)	$	938,181
Operating costs and expenses:
Cost of sales	—			687,053			17,637			(1,036		)	703,654
Selling, general and administrative	10,189			41,412			4,592			—			56,193
Depreciation and amortization	610			30,282			1,106			—			31,998
Acquisition and integration expenses	—			1,432			—			—			1,432
Early retirement incentives	1,957			—			—						1,957
	12,756			760,179			23,335			(1,036		)	795,234
Operating (loss) income	(12,756		)	154,764			939			—			142,947
Intercompany interest and charges	(49,217		)	48,441			776			—			—
Interest expense and other	15,143			2,062			(537		)	—			16,668
Income before income taxes	21,318			104,261			700			—			126,279
Income tax expense	8,709			37,140			239			—			46,088
Net income	12,609			67,121			461			—			80,191
Other comprehensive (loss) income	—			(1,478		)	4,093			—			2,615
Total comprehensive income	$	12,609		$	65,643		$	4,554		$	—		$	82,806
14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
	Six Months Ended September 30, 2013
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net sales	$	—		$	1,827,850		$	85,721		$	(2,543	)	$	1,911,028
Operating costs and expenses:
Cost of sales	—			1,404,453			65,879			(2,543		)	1,467,789
Selling, general and administrative	20,776			97,466			12,058			—			130,300
Depreciation and amortization	1,422			71,061			3,695			—			76,178
Relocation costs	—			2,444			—			—			2,444
	22,198			1,575,424			81,632			(2,543		)	1,676,711
Operating (loss) income	(22,198		)	252,426			4,089			—			234,317
Intercompany interest and charges	(110,746		)	108,531			2,215			—			—
Interest expense and other	37,952			3,567			(1,488		)	—			40,031
Income before income taxes	50,596			140,328			3,362			—			194,286
Income tax expense	11,532			53,721			474			—			65,727
Net income	39,064			86,607			2,888			—			128,559
Other comprehensive income	—			1,873			2,770			—			4,643
Total comprehensive income	$	39,064		$	88,480		$	5,658		$	—		$	133,202
14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
	Six Months Ended September 30, 2012
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net sales	$	—		$	1,777,419		$	51,175		$	(2,725	)	$	1,825,869
Operating costs and expenses:
Cost of sales	—			1,321,190			36,466			(2,725		)	1,354,931
Selling, general and administrative	20,775			87,585			9,792			—			118,152
Depreciation and amortization	1,209			60,415			2,189			—			63,813
Acquisition and integration expenses	295			1,682			—			—			1,977
Early retirement incentives	3,107			—			—			—			3,107
	25,386			1,470,872			48,447			(2,725		)	1,541,980
Operating (loss) income	(25,386		)	306,547			2,728			—			283,889
Intercompany interest and charges	(98,554		)	96,952			1,602			—			—
Interest expense and other	30,642			4,493			(1,235		)	—			33,900
Income before income taxes	42,526			205,102			2,361			—			249,989
Income tax expense	18,889			73,984			593			—			93,466
Net income	23,637			131,118			1,768			—			156,523
Other comprehensive loss	—			(3,143		)	(329		)	—			(3,472		)
Total comprehensive income	$	23,637		$	127,975		$	1,439		$	—		$	153,051
14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS:
	Six Months Ended September 30, 2013
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net income	$	39,064		$	86,607		$	2,888		$	—		$	128,559
Adjustments to reconcile net income to net cash provided by (used in) operating activities	17,740			(141,989		)	40,736			(1,424		)	(84,937		)
Net cash provided by (used in)operating activities	56,804			(55,382		)	43,624			(1,424		)	43,622
Capital expenditures	(1,654		)	(111,806		)	(5,805		)	—			(119,265		)
Reimbursed capital expenditures	—			5,037			—			—			5,037
Proceeds from sale of assets	—			11,707			6			—			11,713
Acquisitions, net of cash acquired	—			—			(31,329		)	—			(31,329		)
Net cash used in investing activities	(1,654		)	(95,062		)	(37,128		)	—			(133,844		)
Net decrease in revolving credit facility	186,606			—			—			—			186,606
Proceeds on issuance of debt	—			15,688			32,900			—			48,588
Retirements and repayments of debt	(77,416		)	(18,210		)	(52,600		)	—			(148,226		)
Payments of deferred financing costs	(472		)	—			—			—			(472		)
Dividends paid	(4,149		)	—			—			—			(4,149		)
Proceeds on governmental grant	—			100			—			—			100
Repurchase of restricted shares for minimum tax obligation	(2,726		)	—			—			—			(2,726		)
Proceeds from exercise of stock options, including excess tax benefit	180			—			—			—			180
Intercompany financing and advances	(157,163		)	152,147			3,592			1,424			—
Net cash (used in) provided by financing activities	(55,140		)	149,725			(16,108		)	1,424			79,901
Effect of exchange rate changes on cash	—			—			727			—			727
Net change in cash and cash equivalents	10			(719		)	(8,885		)	—			(9,594		)
Cash and cash equivalents at beginning of period	3,110			1,537			27,390			—			32,037
Cash and cash equivalents at end of period	$	3,120		$	818		$	18,505		$	—		$	22,443
14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS:
	Six Months Ended September 30, 2012
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net income	$	23,637		$	131,118		$	1,768		$	—		$	156,523
Adjustments to reconcile net income to net cash provided by operating activities	1,011			(40,699		)	16,080			—			(23,608		)
Net cash provided by operating activities	24,648			90,419			17,848			—			132,915
Capital expenditures	(273		)	(58,686		)	(2,234		)	—			(61,193		)
Reimbursed capital expenditures	—			2,028			—			—			2,028
Proceeds from sale of assets	—			455			5			—			460
Net cash used in investing activities	(273		)	(56,203		)	(2,229		)	—			(58,705		)
Net increase in revolving credit facility	(81,709		)	—			—			—			(81,709		)
Proceeds on issuance of debt	—			11,199			59,900			—			71,099
Retirements and repayments of debt	(19,059		)	(6,694		)	(30,100		)	—			(55,853		)
Payments of deferred financing costs	(2,244		)	—			—			—			(2,244		)
Dividends paid	(3,997		)	—			—			—			(3,997		)
Withholding of restricted shares for minimum tax obligation	(1,840		)	—			—			—			(1,840		)
Proceeds from government grant	—			1,000			—			—			1,000
Proceeds from exercise of stock options, including excess tax benefit	270			—			—			—			270
Intercompany financing and advances	79,718			(41,444		)	(38,274		)	—			—
Net cash used in financing activities	(28,861		)	(35,939		)	(8,474		)	—			(73,274		)
Effect of exchange rate changes on cash	—			—			53			—			53
Net change in cash and cash equivalents	(4,486		)	(1,723		)	7,198			—			989
Cash and cash equivalents at beginning of period	7,969			2,237			19,456			—			29,662
Cash and cash equivalents at end of period	$	3,483		$	514		$	26,654		$	—		$	30,651

COMMITMENTS_AND_CONTINGENCIES

COMMITMENTS AND CONTINGENCIES	6 Months Ended
	Sep. 30, 2013
Commitments and Contingencies [Abstract]	'
Commitments and Contingencies Disclosure [Text Block]	'
	COMMITMENTS AND CONTINGENCIES
	Trade Secret Litigation over Claims of Eaton Corporation
	On July 9, 2004, Eaton Corporation and several of its subsidiaries ("Eaton") sued the Company, a subsidiary and certain employees of the Company and the subsidiary on claims alleging misappropriation of trade secrets and intellectual property allegedly belonging to Eaton relating to the design and manufacture of hydraulic pumps and motors used in military and commercial aviation. The subsidiary and the individual engineer defendants answered Eaton's claims and filed counterclaims, while the Company and an officer of the Company moved to dismiss for lack of personal jurisdiction. In the course of discovery in the suit, the court began an investigation of allegations of wrongdoing by Eaton in its conduct of the litigation. Eaton denied, and continues to deny, these allegations. On December 22, 2010, however, the court dismissed all of Eaton's claims with prejudice based on the court's conclusion that a fraud had been perpetrated on the court by counsel for Eaton of which Eaton was aware or should have been aware. Meanwhile, the Company, several subsidiaries, and the employees sued by Eaton are now pursuing claims (including antitrust claims) and counterclaims against Eaton based on the Eaton misconduct that led to the dismissal of Eaton's claims. Given the court's dismissal of Eaton's claims, we cannot conclude that a loss arising from Eaton's claims is probable; however, given the unusual nature and complexity of the case, we also cannot conclude that the probability of loss is remote, nor can we reasonably estimate the possible loss, or range of loss, that could be incurred by the Company if Eaton were to prevail on appeal and in the litigation that would follow. Even if Eaton were to prevail on appeal, however, we believe we have substantial defenses and would expect to defend the claims vigorously.
	Other
	In the ordinary course of business, the Company is also involved in disputes, claims, lawsuits, and governmental and regulatory inquiries that it deems to be immaterial. Some may involve claims or potential claims of substantial damages, fines or penalties. While the Company cannot predict the outcome of any pending or future litigation or proceeding and no assurances can be given, the Company does not believe that any pending matter will have a material effect, individually or in the aggregate, on its financial position or results of operations.

Relocation_Costs_Notes

Relocation Costs (Notes)	6 Months Ended
	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'
Restructuring and Related Costs [Table Text Block]	'
	16.    RELOCATION COSTS
	During the fiscal year ended March 31, 2013, the Company committed to relocate the operations of its largest facility in Dallas, Texas and to expand its Red Oak, Texas ("Red Oak") facility to accommodate this relocation. The Company incurred approximately $1,229 and $2,444 of expenses related to the relocation during the three and six months ended September 30, 2013, respectively. The Company also incurred $4,329 and $6,638 of disruption and accelerated depreciation during the three and six months ended September 30, 2013, respectively, related to the relocation. The Company expects to incur approximately $28,000 to $40,000 in relocation and related disruption for the fiscal year ended March 31, 2014. The relocation is expected to be completed in early fiscal 2015.

SUMMARY_OF_SIGNIFICANT_ACCOUNT1

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	6 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Use of Estimates	'
	Use of Estimates
	The preparation of the financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.
Revenue Recognition	'
	Revenue Recognition
	Revenues are generally recognized in accordance with the contract terms when products are shipped, delivery has occurred or services have been rendered, pricing is fixed and determinable, and collection is reasonably assured. A significant portion of the Company’s contracts are within the scope of the Revenue - Construction-Type and Production-Type Contracts topic of the Accounting Standards Codification (“ASC”) and revenue and costs on contracts are recognized using the percentage-of-completion method of accounting. Accounting for the revenue and profit on a contract requires estimates of (1) the contract value or total contract revenue, (2) the total costs at completion, which is equal to the sum of the actual incurred costs to date on the contract and the estimated costs to complete the contract’s scope of work and (3) the measurement of progress towards completion. Depending on the contract, the Company measures progress toward completion using either the cost-to-cost method or the units-of-delivery method of accounting, with the great majority measured under the units-of-delivery method of accounting.
	•	Under the cost-to-cost method of accounting, progress toward completion is measured as the ratio of total costs incurred to estimated total costs at completion. Costs are recognized as incurred. Profit is determined based on estimated profit margin on the contract multiplied by the progress toward completion. Revenue represents the sum of costs and profit on the contract for the period.
	•	Under the units-of-delivery method of accounting, revenue on a contract is recorded as the units are delivered and accepted during the period at an amount equal to the contractual selling price of those units. The costs recorded on a contract under the units-of-delivery method of accounting are equal to the total costs at completion divided by the total units to be delivered. As contracts can span multiple years, the Company often segments the contracts into production lots for the purposes of accumulating and allocating cost. Profit is recognized as the difference between revenue for the units delivered and the estimated costs for the units delivered.
	Adjustments to original estimates for a contract’s revenues, estimated costs at completion and estimated total profit are often required as work progresses under a contract, as experience is gained and as more information is obtained, even though the scope of work required under the contract may not change, or if contract modifications occur. These estimates are also sensitive to the assumed rate of production. Generally, the longer it takes to complete the contract quantity, the more relative overhead that contract will absorb. The impact of revisions in cost estimates is recognized on a cumulative catch-up basis in the period in which the revisions are made. Provisions for anticipated losses on contracts are recorded in the period in which they become evident (‘‘forward losses’’) and are first offset against costs that are included in inventory, with any remaining amount reflected in accrued contract liabilities in accordance with the Construction-Type and Production-Type Contracts topic. Revisions in contract estimates, if significant, can materially affect results of operations and cash flows, as well as valuation of inventory. Furthermore, certain contracts are combined or segmented for revenue recognition in accordance with the Construction-Type and Production-Type Contracts topic.
	For the three months ended September 30, 2013, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(25,364), $(17,287) and $(0.33) net of tax, respectively. The cumulative catch-up adjustments to operating income for the three months ended September 30, 2013 included gross favorable adjustments of approximately $9,783 and gross unfavorable adjustments of approximately $(35,147). For the six months ended September 30, 2013, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(23,005), $(15,222) and $(0.29) net of tax, respectively. The cumulative catch-up adjustments to operating income for the six months ended September 30, 2013 included gross favorable adjustments of approximately $11,421 and gross unfavorable adjustments of approximately $(34,426). For the three months ended September 30, 2012, cumulative catch-up adjustments from changes in estimates increased operating income, net income and earnings per share by approximately $158, $100 and $0.00 net of tax, respectively. For the six months ended September 30, 2012, cumulative catch-up adjustments from changes in estimates decreased operating income, net income and earnings per share by approximately $(4,791), $(3,000) and $(0.06) net of tax, respectively.
	Amounts representing contract change orders or claims are only included in revenue when such change orders or claims have been settled with the customer and to the extent that units have been delivered. Additionally, some contracts may contain provisions for revenue sharing, price re-determination, requests for equitable adjustments, change orders or cost and/or performance incentives. Such amounts or incentives are included in contract value when the amounts can be reliably estimated and their realization is reasonably assured.
	Although fixed-price contracts, which extend several years into the future, generally permit the Company to keep unexpected profits if costs are less than projected, the Company also bears the risk that increased or unexpected costs may reduce profit or cause the Company to sustain losses on the contract. In a fixed-price contract, the Company must fully absorb cost overruns, notwithstanding the difficulty of estimating all of the costs the Company will incur in performing these contracts and in projecting the ultimate level of revenue that may otherwise be achieved.
	Failure to anticipate technical problems, estimate delivery reductions, estimate costs accurately or control costs during performance of a fixed-price contract may reduce the profitability of a fixed-price contract or cause a loss. The Company believes that it has recognized adequate provisions in the financial statements for losses on fixed-price contracts, but cannot be certain that the contract loss provisions will be adequate to cover all actual future losses.
	While the Company is currently projecting its recurring production contracts to be profitable, there is still a substantial amount of risk similar to what the Company has experienced on certain programs (such as 747-8). Particularly, the Company's ability to manage risks related to supplier performance, execution of cost reduction strategies, hiring and retaining skilled production and management personnel, quality and manufacturing execution, program schedule delays and many other risks, will determine the ultimate performance of these programs.
	The next twelve months will be critical time for these programs as the Company attempts to return to baseline performance for the recurring cost structure. Recognition of forward-losses in the future periods continues to be a significant risk and will depend upon several factors including the Company's market forecast, possible airplane program delays, the Company's ability to successfully perform under revised design and manufacturing plans, achievement of forecasted cost reductions as the Company continues production and the ability to successfully resolve claims and assertions with the Company's customers and suppliers.
	Included in net sales of the Aerostructures Group is the non-cash amortization of acquired contract liabilities recognized as fair value adjustments through purchase accounting of the acquisition of Vought Aircraft Industries, Inc. ("Vought") on June 16, 2010. For the three months ended September 30, 2013 and 2012, the Company recognized $5,614 and $6,563, respectively, into net sales in the accompanying consolidated statements of income. For the six months ended September 30, 2013 and 2012, the Company recognized $11,755 and $13,555, respectively, into net sales in the accompanying consolidated statements of income.
	Included in net sales of the Aerospace Systems Group is the non-cash amortization of acquired contract liabilities recognized as fair value adjustments through provisional purchase accounting of the acquisition of Goodrich Corporation (Goodrich Pump & Engine Control Systems) ("GPECS") on March 18, 2013. For the three and six months ended September 30, 2013, the Company recognized $3,351 and $8,360, respectively, into net sales in the accompanying consolidated statements of income.
	The Aftermarket Services Group provides repair and overhaul services, a small portion of which services are provided under long-term power-by-the-hour contracts. The Company applies the proportional performance method of accounting to recognize revenue under these contracts. Revenue is recognized over the contract period as units are delivered based on the relative value in proportion to the total estimated contract consideration. In estimating the total contract consideration, management evaluates the projected utilization of its customers’ fleet over the term of the contract, in connection with the related estimated repair and overhaul servicing requirements to the fleet based on such utilization. Changes in utilization of the fleet by customers, among other factors, may have an impact on these estimates and require adjustments to estimates of revenue to be realized.
Concentration of Credit Risk	'
	Concentration of Credit Risk
	The Company’s trade accounts receivable are exposed to credit risk. However, the risk is limited due to the diversity of the customer base and the customer base’s wide geographical area. Trade accounts receivable from The Boeing Company (“Boeing”) (representing commercial, military and space) represented approximately 32.3% and 32.0% of total trade accounts receivable as of September 30, 2013 and March 31, 2013, respectively. The Company had no other concentrations of credit risk of more than 10%. Sales to Boeing for the six months ended September 30, 2013 were $880,078, or 46% of net sales, of which $827,116, $41,561 and $11,401 were from the Aerostructures segment, the Aerospace Systems segment and Aftermarket Services segment, respectively. Sales to Boeing for the six months ended September 30, 2012 were $899,302, or 49% of net sales, of which $847,982, $35,974 and $15,346 were from the Aerostructures segment, the Aerospace Systems segment and Aftermarket Services segment, respectively. No other single customer accounted for more than 10% of the Company’s net sales. However, the loss of any significant customer, including Boeing, could have a material adverse effect on the Company and its operating subsidiaries.
Stock-Based Compensation	'
	Stock-Based Compensation
	The Company recognizes compensation expense for share-based awards based on the fair value of those awards at the date of grant. Stock-based compensation expense for the three months ended September 30, 2013 and 2012 was $935 and $1,631, respectively. Stock-based compensation expense for the six months ended September 30, 2013 and 2012 was $2,263 and $3,162, respectively. The stock-based compensation expense decreased for the three months and six months ended September 30, 2013, respectively, as compared to the three months and six months ended September 30, 2012, respectively, due to decreased performance. The Company has classified share-based compensation within selling, general and administrative expenses to correspond with the same line item as the majority of the cash compensation paid to employees. Upon the exercise of stock options or vesting of restricted stock, the Company first transfers treasury stock, then issues new shares.
Intangibles policy [Policy Text Block]	'
	Intangible Assets
	The components of intangible assets, net, are as follows:
		September 30, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	595,956		$	(118,106	)	$	477,850
	Product rights, technology and licenses	11.7		56,876			(30,503		)	26,373
	Non-compete agreements and other	9.9		1,705			(1,296		)	409
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,092,937		$	(149,905	)	$	943,032
		March 31, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	588,761		$	(98,483	)	$	490,278
	Product rights and licenses	11.3		56,876			(27,775		)	29,101
	Non-compete agreements and other	8.8		2,205			(1,625		)	580
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,086,242		$	(127,883	)	$	958,359
	Amortization expense for the three months ended September 30, 2013 and 2012 was $10,617 and $8,556, respectively. Amortization expense for the six months ended September 30, 2013 and 2012 was $22,150 and $17,123, respectively.
Product Warranty Disclosure [Text Block]	'
	Warranty Reserves
	A reserve has been established to provide for the estimated future cost of warranties on our delivered products. The Company periodically reviews the reserves and adjustments are made accordingly. A provision for warranty on products delivered is made on the basis of historical experience and identified warranty issues. Warranties cover such factors as non-conformance to specifications and defects in material and workmanship. The majority of the Company's agreements include a three-year warranty, although certain programs have warranties up to 20 years.
	The following is a roll-forward of the warranty reserves for the six months ended September 30, 2013 and 2012, respectively:
			2013			2012
	Balance, March 31		$	21,775		$	14,473
	Charges (credits) to costs and expenses		5,074			50
	Write-offs, net of recoveries		(3,508		)	(1,276		)
	Exchange rate changes		16			(9		)
	Balance, September 30		$	23,357		$	13,238
Cash Flow, Supplemental Disclosures [Text Block]	'
	Supplemental Cash Flow Information
	The Company paid $1,370 and $2,840 for income taxes, net of refunds received, for the six months ended September 30, 2013 and 2012, respectively. The Company made interest payments of $30,110 and $31,755 for the six months ended September 30, 2013 and 2012, respectively.
	During the six months ended September 30, 2013 and 2012, the Company financed $36 and $25 of property and equipment additions through capital leases, respectively. During the six months ended September 30, 2013 and 2012, the Company issued 1,849,596 and 386,936 shares, respectively, in connection with certain redemptions of convertible senior subordinated notes (see Note 6).

SUMMARY_OF_SIGNIFICANT_ACCOUNT2

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)	6 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets by Major Class [Table Text Block]	'
		September 30, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	595,956		$	(118,106	)	$	477,850
	Product rights, technology and licenses	11.7		56,876			(30,503		)	26,373
	Non-compete agreements and other	9.9		1,705			(1,296		)	409
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,092,937		$	(149,905	)	$	943,032
		March 31, 2013
		Weighted-		Gross Carrying			Accumulated			Net
		Average Life		Amount			Amortization
	Customer relationships	16.5		$	588,761		$	(98,483	)	$	490,278
	Product rights and licenses	11.3		56,876			(27,775		)	29,101
	Non-compete agreements and other	8.8		2,205			(1,625		)	580
	Tradename	Indefinite-lived		438,400			—			438,400
	Total intangibles, net			$	1,086,242		$	(127,883	)	$	958,359
Schedule of Product Warranty Liability [Table Text Block]	'
			2013			2012
	Balance, March 31		$	21,775		$	14,473
	Charges (credits) to costs and expenses		5,074			50
	Write-offs, net of recoveries		(3,508		)	(1,276		)
	Exchange rate changes		16			(9		)
	Balance, September 30		$	23,357		$	13,238

ACQUISITIONS_Tables

ACQUISITIONS (Tables)	6 Months Ended
	Sep. 30, 2013
Business Acquisition [Line Items]	'
Business Acquisition, Pro Forma Information [Table Text Block]	'
		Three Months Ended September 30,					Six Months Ended September 30,
		2013			2012		2013		2012
	Net Sales	$	967,345		$	1,008,698	$	1,916,224	$	1,965,987
	Net income	49,516			82,450		129,044		164,340
	Earnings per share—basic	$	0.96		$	1.66	$	2.51	$	3.32
	Earnings per share—diluted	$	0.94		$	1.58	$	2.44	$	3.14
GPECS [Member]	'
Business Acquisition [Line Items]	'
Business Combination, Separately Recognized Transactions [Table Text Block]	'
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with ASC 805. The Company is awaiting final appraisal of tangible assets, intangible assets and certain contingent liabilities related to the GPECS acquisition. Accordingly, the Company has adjusted the value of intangible assets, property and equipment and contingent liabilities to draft appraisals. During the six months ended September 30, 2013, the Company recognized an increase of $29,511 in the provisional value of intangible assets as a result of the recognition of a definite-lived technology intangible asset and changes in the fair value of customer relationships acquired. Additionally, the Company recognized other immaterial adjustments to various assets acquired and liabilities assumed as of the acquisition date. These purchase price adjustments decreased the provisionally recognized goodwill by $28,193 and have been reflected retrospectively as of March 31, 2013 in the accompanying Consolidated Balance Sheet. The effect on net income for the period March 18, 2013 through March 31, 2013 was not material. The allocation of the purchase price of the GPECS acquisition is not complete and the amounts below report the Company's best estimate of the fair value based on the information available at this time:
		March 18, 2013
	Accounts receivable	$	15,888
	Inventory	41,416
	Prepaid expenses and other	568
	Property and equipment	26,906
	Goodwill	94,563
	Intangibles assets	109,100
	Deferred taxes	34,936
	Total assets	$	323,377
	Accounts payable	$	16,000
	Accrued expenses	15,738
	Acquired contract liabilities, net	80,000
	Other noncurrent liabilities	2,989
	Total liabilities	$	114,727
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	'
	The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:
		Estimated Useful Life	Estimated Fair Value
	Technology	10 years	$	19,100
	Customer relationships	20 years	90,000
			$	109,100
Primus Corporation [Member]	'
Business Acquisition [Line Items]	'
Business Combination, Separately Recognized Transactions [Table Text Block]	'
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with Accounting Standards Codification Topic 805, Business Combinations ("ASC 805"). The Company is awaiting final appraisal of tangible assets, intangible assets and certain contingent liabilities related to the Primus acquisition. Accordingly, the Company has adjusted the value of intangible assets and property and equipment to draft appraisals. During the six months ended September 30, 2013, the Company recognized an increase of $2,258 in the provisional value of the intangible asset and a decrease of $17,819 in the provisional value of property and equipment as a result of changes in fair value. These purchase price adjustments increased the provisionally recognized goodwill by $15,670 and have been reflected in the accompanying Consolidated Balance Sheet as of September 30, 2013. The effect on net income for the six months ended September 30, 2013 was not material. The allocation of the purchase price of the Primus acquisition is not complete and the amounts below report the Company's best estimate of the fair value based on the information available at this time:
		May 6, 2013
	Cash	$	2,201
	Accounts receivable	17,349
	Inventory	19,102
	Prepaid expenses and other	883
	Property and equipment	29,425
	Goodwill	21,202
	Intangibles assets	6,426
	Other noncurrent assets	5,537
	Total assets	$	102,125
	Accounts payable	$	10,027
	Accrued expenses	23,804
	Deferred taxes	4,764
	Total liabilities	$	38,595
Embee Incorporated [Member]	'
Business Acquisition [Line Items]	'
Business Combination, Separately Recognized Transactions [Table Text Block]	'
	The table below presents the provisional estimated fair value of assets acquired and liabilities assumed on the acquisition date based on the best information it has received to date, in accordance with ASC 805:
		December 19, 2012
	Cash	$	750
	Accounts receivable	7,013
	Inventory	411
	Prepaid expenses and other	517
	Property and equipment	14,360
	Goodwill	69,578
	Intangible assets	55,501
	Deferred taxes	455
	Other assets	6,738
	Total assets	$	155,323
	Accounts payable	$	1,591
	Accrued expenses	2,309
	Other noncurrent liabilities	9,560
	Total liabilities	$	13,460
Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]	'
	The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:
		Estimated Useful Life	Estimated Fair Value
	Tradename	Indefinite-lived	$	13,400
	Customer relationships	10 years	42,101
			$	55,501

DISCONTINUED_OPERATIONS_AND_AS1

DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE DISCOUNTINUED OPERATIONS AND ASSSETS HELD FOR SALE (Tables)	6 Months Ended
	Sep. 30, 2013
Discontinued operations and assets held for sale	'
Schedule of Disposal Groups, Including Discontinued Operations, Income Statement, Balance Sheet and Additional Disclosures [Table Text Block]	'
		31-Mar-13
	Assets held for sale:
	Trade and other receivables, net	$	2,545
	Inventories	7,668
	Rotable assets	1,957
	Property, plant and equipment	2,431
	Other	146
	Total assets held for sale	$	14,747
	Liabilities related to assets held for sale:
	Accounts payable	$	1,515
	Accrued expenses	945
	Other noncurrent liabilities	161
	Total liabilities related to assets held for sale	$	2,621

INVENTORIES_Tables

INVENTORIES (Tables)	6 Months Ended
	Sep. 30, 2013
Inventory Disclosure [Abstract]	'
Schedule of components of inventories	'
		September 30, 2013			March 31, 2013
	Raw materials	$	83,001		$	70,242
	Work-in-process, including manufactured and purchased components	1,064,644			965,825
	Finished goods	88,481			75,960
	Less: unliquidated progress payments	(140,624		)	(124,128		)
	Total inventories	$	1,095,502		$	987,899

LONGTERM_DEBT_Tables

LONG-TERM DEBT (Tables)	6 Months Ended
	Sep. 30, 2013
Debt Disclosure [Abstract]	'
Schedule of long-term debt	'
		September 30, 2013		March 31, 2013
	Revolving credit facility	$	282,455	$	95,849
	Receivable securitization facility	160,300		150,000
	Equipment leasing facility and other capital leases	68,683		61,449
	Secured promissory notes	—		8,741
	Senior subordinated notes due 2017	173,494		173,344
	Senior notes due 2018	348,275		348,133
	Senor notes due 2021	375,000		375,000
	Convertible senior subordinated notes	32,107		109,369
	Other debt	7,978		7,978
		1,448,292		1,329,863
	Less current portion	48,894		133,930
		$	1,399,398	$	1,195,933

FAIR_VALUE_MEASUREMENTS_Tables

FAIR VALUE MEASUREMENTS (Tables)	6 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Assets and liabilities reported at fair value and measured on a recurring basis	'
	Description		Level		September 30, 2013				March 31, 2013
	Contingent consideration		3		$	(1,638	)		$	(2,614	)
	Foreign exchange derivative		2		(222		)		209
	Non-hedge derivative		2		(102		)		—
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]	'
Schedule of Derivatives Instruments Statements of Financial Performance and Financial Position, Location [Table Text Block]	'
	included in the table above relate to derivative financial instruments that the Company uses to manage its exposure to fluctuations in foreign currency exchange rates. Foreign currency exchange contracts are entered into to manage the exchange rate risk of forecasted foreign currency denominated cash payments. The foreign currency exchange contracts are designated as cash flow hedges. The classification of gains and losses resulting from changes in the fair values of the foreign exchange derivatives is dependent on the intended use of the derivative and its resulting designation. Adjustments to reflect changes in fair values of foreign exchange derivatives attributable to the effective portion of hedges that are considered highly effective hedges are reflected net of income taxes in accumulated other comprehensive income (loss) until the hedged transaction is recognized in earnings. Changes in the fair value of the foreign exchange derivatives that are attributable to the ineffective portion of the hedges, or of cash flow hedge that are not considered to be highly effective hedges, if any, are immediately recognized in earnings. The aggregate notional amount of our outstanding foreign currency exchange contracts at September 30, 2013 was $9,542, with open settlement dates up to September 30, 2014. The amount of ineffectiveness on foreign exchange derivatives is not significant. The Company estimates that approximately $141 of losses presently in accumulated other comprehensive income (loss) will be reclassified into earnings during the next twelve months.
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]	'
		March 31, 2013				Net Purchases				Net Realized			Net Unrealized		30-Sep-13
		Balance				(Sales), Issues (Settlements)				Appreciation			Appreciation		Balance
										(Depreciation)			(Depreciation)
	Contingent consideration	$	(2,614	)		$	1,100			$	(124	)	$	—	$	(1,638	)
		March 31, 2012				Net Purchases				Net Realized			Net Unrealized		30-Sep-12
		Balance				(Sales), Issues (Settlements)				Appreciation			Appreciation		Balance
										(Depreciation)			(Depreciation)
	Contingent consideration	$	(2,019	)		$	—			$	(452	)	$	—	$	(2,471	)
Fair Value Inputs, Liabilities, Quantitative Information [Table Text Block]	'
		30-Sep-13				Valuation Technique		Unobservable input		Range
		Balance
	Contingent consideration	$	(1,638	)		Discounted cash flow		Earnings of acquired company		$0 - $1,900
Schedule of carrying amounts and the related estimated fair values of financial instruments	'
		September 30, 2013								March 31, 2013
		Carrying				Fair Value				Carrying			Fair Value
		Value								Value
	Long-term debt	$	1,448,292			$	1,524,557			$	1,329,863		$	1,594,800

EARNINGS_PER_SHARE_Tables

EARNINGS PER SHARE (Tables)	6 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Reconciliation between the weighted average outstanding shares used in calculation of basic and diluted earnings per share	'
		Three Months Ended September 30,		Six Months Ended September 30,
		(in thousands)		(in thousands)
		2013	2012	2013	2012
	Weighted-average common shares outstanding – basic	51,807	49,657	51,311	49,536
	Net effect of dilutive stock options and nonvested stock	247	373	273	387
	Potential common shares – convertible debt	766	2,258	1,229	2,357
	Weighted-average common shares outstanding – diluted	52,820	52,288	52,813	52,280

GOODWILL_Tables

GOODWILL (Tables)	6 Months Ended
	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]	'
Schedule of changes in the carrying value of goodwill by reportable segment	'
		Aerostructures			Aerospace		Aftermarket		Total
					Systems		Services
	Balance, March 31, 2013	$	1,316,450		$	344,964	$	55,986	$	1,717,400
	Goodwill recognized in connection with acquisitions	21,202			—		—		21,202
	Purchase accounting adjustments	33			—		—		33
	Effect of exchange rate changes	(706		)	2,226		—		1,520
	Balance, September 30, 2013	$	1,336,979		$	347,190	$	55,986	$	1,740,155

PENSION_AND_OTHER_POSTRETIREME1

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Tables)	6 Months Ended
	Sep. 30, 2013
Pension benefits	'
Components of net periodic benefit costs:	'
Schedule of components of net periodic benefit cost and postretirement benefit plan	'
		Pension benefits
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Components of net periodic benefit expense (income):
	Service cost	$	3,293		$	4,626		$	6,586		$	9,252
	Interest cost	23,216			24,587			46,432			49,174
	Expected return on plan assets	(37,018		)	(34,333		)	(74,036		)	(68,667		)
	Amortization of prior service costs	(1,683		)	(1,458		)	(3,366		)	(2,915		)
	Amortization of net loss	4,531			79			9,062			159
	Special termination benefits	—			1,957			—			3,107
	Net periodic benefit income	$	(7,661	)	$	(4,542	)	$	(15,322	)	$	(9,890	)
Other postretirement	'
Components of net periodic benefit costs:	'
Schedule of components of net periodic benefit cost and postretirement benefit plan	'
		Other postretirement benefits
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Components of net periodic benefit expense:
	Service cost	$	765		$	884		$	1,530		$	1,769
	Interest cost	3,138			3,941			6,276			7,881
	Amortization of prior service costs	(1,132		)	(1,133		)	(2,264		)	(2,265		)
	Net periodic benefit expense	$	2,771		$	3,692		$	5,542		$	7,385

STOCKHOLDERS_EQUITY_Tables

STOCKHOLDERS' EQUITY (Tables)	6 Months Ended
	Sep. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'
Stockholders' Equity Note Disclosure [Text Block]	'
	12.     STOCKHOLDERS' EQUITY
	Accumulated Other Comprehensive Loss
	Changes in accumulated other comprehensive loss (AOCI) by component for the three and six months ended September 30, 2013 were as follows:
		Currency Translation Adjustment		Unrealized Gains and Losses on Derivative Instruments			Defined Benefit Pension Plans and Other Postretirement Benefits				Total (1)
	Balance June 30, 2013	$	3,004	$	(89	)	$	(63,544	)		$	(60,629	)
	OCI before reclassifications	3,279		—			—				3,279
	Amounts reclassified from AOCI	—		(51		)	1,072			-2	1,021
	Net current period OCI	3,279		(51		)	1,072				4,300
	Balance September 30, 2013	$	6,283	$	(140	)	$	(62,472	)		$	(56,329	)
		Currency Translation Adjustment		Unrealized Gains and Losses on Derivative Instruments			Defined Benefit Pension Plans and Other Postretirement Benefits					Total (1)
	Balance March 31, 2013	$	3,513	$	131		$	(64,616	)			$	(60,972	)
	OCI before reclassifications	2,770		(235		)	—					2,535
	Amounts reclassified from AOCI	—		(36		)	2,144			(3	)	2,108
	Net current period OCI	2,770		(271		)	2,144					4,643
	Balance September 30, 2013	$	6,283	$	(140	)	$	(62,472	)			$	(56,329	)
	(1) Net of tax.
	(2) Primarily relates to amortization of actuarial losses for the three months ended September 30, 2013 totaling $2,831 (net of tax of $1,700) which is included in the net periodic pension cost of which a portion is allocated to production as inventoried costs.
	(3) Primarily relates to amortization of actuarial losses for the six months ended September 30, 2013 totaling $5,662 (net of tax of $3,400) which is included in the net periodic pension cost of which a portion is allocated to production as inventoried costs.
Comprehensive Income (Loss) Note [Text Block]	'
	Changes in accumulated other comprehensive loss (AOCI) by component for the three and six months ended September 30, 2013 were as follows:
		Currency Translation Adjustment		Unrealized Gains and Losses on Derivative Instruments			Defined Benefit Pension Plans and Other Postretirement Benefits				Total (1)
	Balance June 30, 2013	$	3,004	$	(89	)	$	(63,544	)		$	(60,629	)
	OCI before reclassifications	3,279		—			—				3,279
	Amounts reclassified from AOCI	—		(51		)	1,072			-2	1,021
	Net current period OCI	3,279		(51		)	1,072				4,300
	Balance September 30, 2013	$	6,283	$	(140	)	$	(62,472	)		$	(56,329	)
		Currency Translation Adjustment		Unrealized Gains and Losses on Derivative Instruments			Defined Benefit Pension Plans and Other Postretirement Benefits					Total (1)
	Balance March 31, 2013	$	3,513	$	131		$	(64,616	)			$	(60,972	)
	OCI before reclassifications	2,770		(235		)	—					2,535
	Amounts reclassified from AOCI	—		(36		)	2,144			(3	)	2,108
	Net current period OCI	2,770		(271		)	2,144					4,643
	Balance September 30, 2013	$	6,283	$	(140	)	$	(62,472	)			$	(56,329	)

SEGMENTS_Tables

SEGMENTS (Tables)	6 Months Ended
	Sep. 30, 2013
Segment Reporting [Abstract]	'
Schedule of selected financial information for each reportable segment and the reconciliation of EBITDA to operating income	'
		Three Months Ended September 30,						Six Months Ended September 30,
		2013			2012			2013			2012
	Net sales:
	Aerostructures	$	690,748		$	713,978		$	1,342,636		$	1,383,831
	Aerospace systems	205,483			150,139			425,009			290,651
	Aftermarket services	72,971			76,061			147,324			156,038
	Elimination of inter-segment sales	(1,857		)	(1,997		)	(3,941		)	(4,651		)
		$	967,345		$	938,181		$	1,911,028		$	1,825,869
	Income from continuing operations before income taxes:
	Operating income (expense):
	Aerostructures	$	64,425		$	121,385		$	164,812		$	241,523
	Aerospace systems	31,740			25,712			74,383			49,177
	Aftermarket services	10,102			10,767			21,381			22,574
	Corporate	(13,296		)	(14,917		)	(26,259		)	(29,385		)
		92,971			142,947			234,317			283,889
	Interest expense and other	20,321			16,668			40,031			33,900
		$	72,650		$	126,279		$	194,286		$	249,989
	Depreciation and amortization:
	Aerostructures	$	26,483		$	24,049		$	52,796		$	47,953
	Aerospace systems	8,549			4,489			17,088			8,963
	Aftermarket services	1,864			2,288			3,741			4,614
	Corporate	1,348			1,172			2,553			2,283
		$	38,244		$	31,998		$	76,178		$	63,813
	Amortization of acquired contract liabilities, net:
	Aerostructures	$	5,614		$	6,563		$	11,755		$	13,555
	Aerospace systems	3,351			—			8,360			—
		$	8,965		$	6,563		20,115			13,555
	Adjusted EBITDA:
	Aerostructures	$	85,294		$	138,871		$	205,853		$	275,921
	Aerospace systems	36,938			30,201			83,111			58,140
	Aftermarket services	11,966			13,055			25,122			27,188
	Corporate	(11,948		)	(11,788		)	(23,706		)	(23,995		)
		$	122,250		$	170,339		$	290,380		$	337,254
	Capital expenditures:
	Aerostructures	$	52,598		$	16,413		$	98,543		$	46,425
	Aerospace systems	5,843			3,810			10,275			6,599
	Aftermarket services	3,915			3,378			8,066			7,475
	Corporate	680			487			2,381			694
		$	63,036		$	24,088		$	119,265		$	61,193
Reconciliation of Assets from Segment to Consolidated [Table Text Block]	'
		September 30, 2013			31-Mar-13
	Total Assets:
	Aerostructures	$	3,818,050		$	3,707,527
	Aerospace systems	1,056,257			1,040,821
	Aftermarket services	318,856			327,609
	Corporate	119,111			108,337
		$	5,312,274		$	5,184,294

SELECTED_CONSOLIDATING_FINANCI1

SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Tables)	6 Months Ended
	Sep. 30, 2013
Condensed Financial Information of Parent Company Only Disclosure [Abstract]	'
Summary of consolidating balance sheets	'
		September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Current assets:
	Cash and cash equivalents	$	3,120		$	818		$	18,505		$	—		$	22,443
	Trade and other receivables, net	1,264			194,246			239,350			—			434,860
	Inventories	—			1,046,062			49,440			—			1,095,502
	Rotable assets	—			24,619			13,553			—			38,172
	Deferred income taxes	51,129			—			11			—			51,140
	Prepaid expenses and other	5,152			10,802			4,118			—			20,072
	Total current assets	60,665			1,276,547			324,977			—			1,662,189
	Property and equipment, net	10,567			805,635			82,429			—			898,631
	Goodwill and other intangible assets, net	—			2,604,946			78,241			—			2,683,187
	Other, net	56,885			8,865			2,517			—			68,267
	Intercompany investments and advances	3,339,235			96,691			5,369			(3,441,295		)	—
	Total assets	$	3,467,352		$	4,792,684		$	493,533		$	(3,441,295	)	$	5,312,274
	Current liabilities:
	Current portion of long-term debt	$	32,360		$	16,534		$	—		$	—		$	48,894
	Accounts payable	—			273,032			17,156			—			290,188
	Accrued expenses	47,400			193,874			23,272			—			264,546
	Total current liabilities	79,760			483,440			40,428			—			603,628
	Long-term debt, less current portion	1,184,969			54,129			160,300			—			1,399,398
	Intercompany advances	—			2,052,759			179,085			(2,231,844		)	—
	Accrued pension and other postretirement benefits, noncurrent	7,376			590,333			—			—			597,709
	Deferred income taxes and other	8,132			511,728			16,845			(12,281		)	524,424
	Total stockholders’ equity	2,187,115			1,100,295			96,875			(1,197,170		)	2,187,115
	Total liabilities and stockholders’ equity	$	3,467,352		$	4,792,684		$	493,533		$	(3,441,295	)	$	5,312,274
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	SUMMARY CONSOLIDATING BALANCE SHEETS:
		March 31, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Current assets:
	Cash and cash equivalents	$	3,110		$	1,537		$	27,390		$	—		$	32,037
	Trade and other receivables, net	1,141			171,186			261,657			—			433,984
	Inventories	—			957,077			30,822			—			987,899
	Rotable assets	—			24,903			9,950			—			34,853
	Deferred income taxes	—			99,546			—			—			99,546
	Prepaid expenses and other	5,533			15,170			2,890			—			23,593
	Assets held for sale	—			14,747			—			—			14,747
	Total current assets	9,784			1,284,166			332,709			—			1,626,659
	Property and equipment, net	9,999			753,510			51,575			—			815,084
	Goodwill and other intangible assets, net	335			2,629,908			45,516			—			2,675,759
	Other, net	58,526			7,873			393			—			66,792
	Intercompany investments and advances	3,137,667			325,786			2,777			(3,466,230		)	—
	Total assets	$	3,216,311		$	5,001,243		$	432,970		$	(3,466,230	)	$	5,184,294
	Current liabilities:
	Current portion of long-term debt	$	109,648		$	24,282		$	—		$	—		$	133,930
	Accounts payable	9,400			309,363			8,663			—			327,426
	Accrued expenses	35,894			231,260			9,514			—			276,668
	Liabilities related to assets held for sale	—			2,621			—			—			2,621
	Total current liabilities	154,942			567,526			18,177			—			740,645
	Long-term debt, less current portion	998,200			47,733			150,000			—			1,195,933
	Intercompany advances	—			2,193,874			202,621			(2,396,495		)	—
	Accrued pension and other postretirement benefits, noncurrent	7,264			663,911			—			—			671,175
	Deferred income taxes and other	10,747			521,885			—			(1,249		)	531,383
	Total stockholders’ equity	2,045,158			1,006,314			62,172			(1,068,486		)	2,045,158
	Total liabilities and stockholders’ equity	$	3,216,311		$	5,001,243		$	432,970		$	(3,466,230	)	$	5,184,294
Condensed consolidating statements of income	'
	4	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
		Six Months Ended September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net sales	$	—		$	1,827,850		$	85,721		$	(2,543	)	$	1,911,028
	Operating costs and expenses:
	Cost of sales	—			1,404,453			65,879			(2,543		)	1,467,789
	Selling, general and administrative	20,776			97,466			12,058			—			130,300
	Depreciation and amortization	1,422			71,061			3,695			—			76,178
	Relocation costs	—			2,444			—			—			2,444
		22,198			1,575,424			81,632			(2,543		)	1,676,711
	Operating (loss) income	(22,198		)	252,426			4,089			—			234,317
	Intercompany interest and charges	(110,746		)	108,531			2,215			—			—
	Interest expense and other	37,952			3,567			(1,488		)	—			40,031
	Income before income taxes	50,596			140,328			3,362			—			194,286
	Income tax expense	11,532			53,721			474			—			65,727
	Net income	39,064			86,607			2,888			—			128,559
	Other comprehensive income	—			1,873			2,770			—			4,643
	Total comprehensive income	$	39,064		$	88,480		$	5,658		$	—		$	133,202
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
		Six Months Ended September 30, 2012
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net sales	$	—		$	1,777,419		$	51,175		$	(2,725	)	$	1,825,869
	Operating costs and expenses:
	Cost of sales	—			1,321,190			36,466			(2,725		)	1,354,931
	Selling, general and administrative	20,775			87,585			9,792			—			118,152
	Depreciation and amortization	1,209			60,415			2,189			—			63,813
	Acquisition and integration expenses	295			1,682			—			—			1,977
	Early retirement incentives	3,107			—			—			—			3,107
		25,386			1,470,872			48,447			(2,725		)	1,541,980
	Operating (loss) income	(25,386		)	306,547			2,728			—			283,889
	Intercompany interest and charges	(98,554		)	96,952			1,602			—			—
	Interest expense and other	30,642			4,493			(1,235		)	—			33,900
	Income before income taxes	42,526			205,102			2,361			—			249,989
	Income tax expense	18,889			73,984			593			—			93,466
	Net income	23,637			131,118			1,768			—			156,523
	Other comprehensive loss	—			(3,143		)	(329		)	—			(3,472		)
	Total comprehensive income	$	23,637		$	127,975		$	1,439		$	—		$	153,051
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
		Three Months Ended September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net sales	$	—		$	924,624		$	44,080		$	(1,359	)	$	967,345
	Operating costs and expenses:
	Cost of sales	—			736,898			35,779			(1,359		)	771,318
	Selling, general and administrative	10,185			46,740			6,658			—			63,583
	Depreciation and amortization	788			35,429			2,027			—			38,244
	Relocation costs	—			1,229			—			—			1,229
		10,973			820,296			44,464			(1,359		)	874,374
	Operating (loss) income	(10,973		)	104,328			(384		)	—			92,971
	Intercompany interest and charges	(53,356		)	52,101			1,255			—			—
	Interest expense and other	19,304			1,833			(816		)	—			20,321
	Income (loss) before income taxes	23,079			50,394			(823		)	—			72,650
	Income tax expense	3,140			19,890			104			—			23,134
	Net income (loss)	19,939			30,504			(927		)	—			49,516
	Other comprehensive income	—			1,021			3,279			—			4,300
	Total comprehensive income	$	19,939		$	31,525		$	2,352		$	—		$	53,816
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	CONDENSED CONSOLIDATING STATEMENTS OF COMPREHENSIVE INCOME:
		Three Months Ended September 30, 2012
	Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
				Subsidiaries			Subsidiaries						Total
Net sales	$	—		$	914,943		$	24,274		$	(1,036	)	$	938,181
Operating costs and expenses:
Cost of sales	—			687,053			17,637			(1,036		)	703,654
Selling, general and administrative	10,189			41,412			4,592			—			56,193
Depreciation and amortization	610			30,282			1,106			—			31,998
Acquisition and integration expenses	—			1,432			—			—			1,432
Early retirement incentives	1,957			—			—						1,957
	12,756			760,179			23,335			(1,036		)	795,234
Operating (loss) income	(12,756		)	154,764			939			—			142,947
Intercompany interest and charges	(49,217		)	48,441			776			—			—
Interest expense and other	15,143			2,062			(537		)	—			16,668
Income before income taxes	21,318			104,261			700			—			126,279
Income tax expense	8,709			37,140			239			—			46,088
Net income	12,609			67,121			461			—			80,191
Other comprehensive (loss) income	—			(1,478		)	4,093			—			2,615
Total comprehensive income	$	12,609		$	65,643		$	4,554		$	—		$	82,806
Condensed consolidating statements of cash flows	'
		Six Months Ended September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net income	$	39,064		$	86,607		$	2,888		$	—		$	128,559
	Adjustments to reconcile net income to net cash provided by (used in) operating activities	17,740			(141,989		)	40,736			(1,424		)	(84,937		)
	Net cash provided by (used in)operating activities	56,804			(55,382		)	43,624			(1,424		)	43,622
	Capital expenditures	(1,654		)	(111,806		)	(5,805		)	—			(119,265		)
	Reimbursed capital expenditures	—			5,037			—			—			5,037
	Proceeds from sale of assets	—			11,707			6			—			11,713
	Acquisitions, net of cash acquired	—			—			(31,329		)	—			(31,329		)
	Net cash used in investing activities	(1,654		)	(95,062		)	(37,128		)	—			(133,844		)
	Net decrease in revolving credit facility	186,606			—			—			—			186,606
	Proceeds on issuance of debt	—			15,688			32,900			—			48,588
	Retirements and repayments of debt	(77,416		)	(18,210		)	(52,600		)	—			(148,226		)
	Payments of deferred financing costs	(472		)	—			—			—			(472		)
	Dividends paid	(4,149		)	—			—			—			(4,149		)
	Proceeds on governmental grant	—			100			—			—			100
	Repurchase of restricted shares for minimum tax obligation	(2,726		)	—			—			—			(2,726		)
	Proceeds from exercise of stock options, including excess tax benefit	180			—			—			—			180
	Intercompany financing and advances	(157,163		)	152,147			3,592			1,424			—
	Net cash (used in) provided by financing activities	(55,140		)	149,725			(16,108		)	1,424			79,901
	Effect of exchange rate changes on cash	—			—			727			—			727
	Net change in cash and cash equivalents	10			(719		)	(8,885		)	—			(9,594		)
	Cash and cash equivalents at beginning of period	3,110			1,537			27,390			—			32,037
	Cash and cash equivalents at end of period	$	3,120		$	818		$	18,505		$	—		$	22,443
	14	SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Continued)
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS:
		Six Months Ended September 30, 2012
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net income	$	23,637		$	131,118		$	1,768		$	—		$	156,523
	Adjustments to reconcile net income to net cash provided by operating activities	1,011			(40,699		)	16,080			—			(23,608		)
	Net cash provided by operating activities	24,648			90,419			17,848			—			132,915
	Capital expenditures	(273		)	(58,686		)	(2,234		)	—			(61,193		)
	Reimbursed capital expenditures	—			2,028			—			—			2,028
	Proceeds from sale of assets	—			455			5			—			460
	Net cash used in investing activities	(273		)	(56,203		)	(2,229		)	—			(58,705		)
	Net increase in revolving credit facility	(81,709		)	—			—			—			(81,709		)
	Proceeds on issuance of debt	—			11,199			59,900			—			71,099
	Retirements and repayments of debt	(19,059		)	(6,694		)	(30,100		)	—			(55,853		)
	Payments of deferred financing costs	(2,244		)	—			—			—			(2,244		)
	Dividends paid	(3,997		)	—			—			—			(3,997		)
	Withholding of restricted shares for minimum tax obligation	(1,840		)	—			—			—			(1,840		)
	Proceeds from government grant	—			1,000			—			—			1,000
	Proceeds from exercise of stock options, including excess tax benefit	270			—			—			—			270
	Intercompany financing and advances	79,718			(41,444		)	(38,274		)	—			—
	Net cash used in financing activities	(28,861		)	(35,939		)	(8,474		)	—			(73,274		)
	Effect of exchange rate changes on cash	—			—			53			—			53
	Net change in cash and cash equivalents	(4,486		)	(1,723		)	7,198			—			989
	Cash and cash equivalents at beginning of period	7,969			2,237			19,456			—			29,662
	Cash and cash equivalents at end of period	$	3,483		$	514		$	26,654		$	—		$	30,651
	CONDENSED CONSOLIDATING STATEMENTS OF CASH FLOWS:
		Six Months Ended September 30, 2013
		Parent			Guarantor			Non-Guarantor			Eliminations			Consolidated
					Subsidiaries			Subsidiaries						Total
	Net income	$	39,064		$	86,607		$	2,888		$	—		$	128,559
	Adjustments to reconcile net income to net cash provided by (used in) operating activities	17,740			(141,989		)	40,736			(1,424		)	(84,937		)
	Net cash provided by (used in)operating activities	56,804			(55,382		)	43,624			(1,424		)	43,622
	Capital expenditures	(1,654		)	(111,806		)	(5,805		)	—			(119,265		)
	Reimbursed capital expenditures	—			5,037			—			—			5,037
	Proceeds from sale of assets	—			11,707			6			—			11,713
	Acquisitions, net of cash acquired	—			—			(31,329		)	—			(31,329		)
	Net cash used in investing activities	(1,654		)	(95,062		)	(37,128		)	—			(133,844		)
Net decrease in revolving credit facility	186,606			—			—			—			186,606
Proceeds on issuance of debt	—			15,688			32,900			—			48,588
Retirements and repayments of debt	(77,416		)	(18,210		)	(52,600		)	—			(148,226		)
Payments of deferred financing costs	(472		)	—			—			—			(472		)
Dividends paid	(4,149		)	—			—			—			(4,149		)
Proceeds on governmental grant	—			100			—			—			100
Repurchase of restricted shares for minimum tax obligation	(2,726		)	—			—			—			(2,726		)
Proceeds from exercise of stock options, including excess tax benefit	180			—			—			—			180
Intercompany financing and advances	(157,163		)	152,147			3,592			1,424			—
Net cash (used in) provided by financing activities	(55,140		)	149,725			(16,108		)	1,424			79,901
Effect of exchange rate changes on cash	—			—			727			—			727
Net change in cash and cash equivalents	10			(719		)	(8,885		)	—			(9,594		)
Cash and cash equivalents at beginning of period	3,110			1,537			27,390			—			32,037
Cash and cash equivalents at end of period	$	3,120		$	818		$	18,505		$	—		$	22,443

SUMMARY_OF_SIGNIFICANT_ACCOUNT3

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenue Recognition	'	'	'	'
Amortization of acquired contract liabilities	'	'	($20,115)	($13,555)
Aerostructures	'	'	'	'
Revenue Recognition	'	'	'	'
Amortization of acquired contract liabilities	-5,614	-6,563	-11,755	-13,555
Aerospace Systems [Member]	'	'	'	'
Revenue Recognition	'	'	'	'
Amortization of acquired contract liabilities	($3,351)	'	($8,360)	'

SUMMARY_OF_SIGNIFICANT_ACCOUNT4

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Aerostructures Group [Member]

Aerostructures Group [Member]

Aerostructures Group [Member]

Aerostructures Group [Member]

Aerospace Systems

Aerospace Systems

Aerospace Systems

Aerospace Systems

Aftermarket Services

Aftermarket Services

Aftermarket Services

Aftermarket Services

Accounts receivables

Accounts receivables

Net sales

Net sales

Net sales

Net sales

Net sales

Net sales

Net sales

Net sales

Net sales

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

The Boeing Company ("Boeing")

Aerostructures Group [Member]

Aerostructures Group [Member]

Aerospace Systems

Aerospace Systems

Aftermarket Services

Aftermarket Services

Concentration of Credit Risk

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Concentration of Risk, Accounts Receivable, Major Customer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

32.00%

32.00%

'

'

'

'

'

'

'

'

'

Percentage from Boeing compared to total

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

46.00%

49.00%

'

'

'

'

'

'

Net sales

$967,345

$938,181

$1,911,028

$1,825,869

$690,748

$713,978

$1,342,636

$1,383,831

$205,483

$150,139

$425,009

$290,651

$72,971

$76,061

$147,324

$156,038

'

'

'

$880,078

$899,302

$827,116

$847,982

$41,561

$35,974

$11,401

$15,346

Concentration Risk, Customer

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'.1

'

'

'

'

'

'

'

'

Stock-Based Compensation

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Share-based Compensation

$935

$1,631

$2,263

$3,162

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Intangibles_Details_3

Intangibles (Details 3) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Mar. 31, 2013

Customer relationships

Customer relationships

Product rights and licenses

Product rights and licenses

Non-compete agreements and other

Non-compete agreements and other

Tradename

Tradename

Intangible Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

Weighted-Average Life (in years)

'

'

'

'

'

'16 years 6 months

'16 years 6 months

'11 years 3 months

'11 years 8 months

'8 years 9 months

'9 years 11 months

'

'

Gross Carrying Amount

'

'

'

'

'

$588,761

$595,956

$56,876

$56,876

$2,205

$1,705

'

'

Accumulated Amortization

-149,905

'

-149,905

'

-127,883

-98,483

-118,106

-27,775

-30,503

-1,625

-1,296

'

0

Finite-lived intangible assets, net

'

'

'

'

'

490,278

477,850

29,101

26,373

580

409

438,400

438,400

Indefinite-lived intangible assets, net

'

'

'

'

'

'

'

'

'

'

'

438,400

438,400

Total intangibles, gross

1,092,937

'

1,092,937

'

1,086,242

'

'

'

'

'

'

'

'

Total intangibles, net

943,032

'

943,032

'

958,359

'

'

'

'

'

'

'

'

Amortization expense

$10,617

$8,556

$22,150

$17,123

'

'

'

'

'

'

'

'

'

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information (Details 4) (USD $)	3 Months Ended	6 Months Ended		12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013	Mar. 31, 2012
Supplemental Cash Flow Information	'	'	'	'	'
Income taxes paid, net of refunds received	'	1,370	2,840	'	'
Cash paid for interest	'	30,110	31,755	'	'
Additional capital lease obligation to finance property and equipment	'	15,688	11,199	'	'
Convertible senior subordinated notes	'	'	'	'	'
Supplemental Cash Flow Information	'	'	'	'	'
Shares issued in connection with certain redemptions (in shares)	394,539,000	1,849,596	386,936	395,269	772,438
Capital Lease Obligations [Member]	'	'	'	'	'
Supplemental Cash Flow Information	'	'	'	'	'
Additional capital lease obligation to finance property and equipment	'	36	25	'	'

SUMMARY_OF_SIGNIFICANT_ACCOUNT5

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Changes in Accounting Estimates (Details 5) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Change in Accounting Estimate [Line Items]	'	'	'	'
Share-based Compensation	$935	$1,631	$2,263	$3,162
Amortization of Acquired Contract Liabilities	'	'	20,115	13,555
Comprehensive Income [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Change in Accounting Estimate	-25,364	158	-23,005	-4,791
Income, net [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Change in Accounting Estimate	-17,287	100	-15,222	-3,000
Diluted earings per share [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Change in Accounting Estimate	0	0	0	0
Gross Favorable Change in Estimates [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Change in Accounting Estimate	9,783	'	11,421	'
Gross Unfavorable Changes In Estimates [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Change in Accounting Estimate	-35,147	'	-34,426	'
Aerospace Systems [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Amortization of Acquired Contract Liabilities	3,351	'	8,360	'
Aerostructures Group [Member]	'	'	'	'
Change in Accounting Estimate [Line Items]	'	'	'	'
Amortization of Acquired Contract Liabilities	$5,614	$6,563	$11,755	$13,555

SUMMARY_OF_SIGNIFICANT_ACCOUNT6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Product Warranty (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Product Warranties [Abstract]	'	'
Standard Product Warranty Description	'3	'
Extended Product Warranty Description	'20	'
Product Warranty Accrual	$23,357	$13,238
Product Warranty Accrual, Preexisting, Increase (Decrease)	5,074	50
Product Warranty Accrual, Payments	-3,508	-1,276
Product Warranty Accrual, Currency Translation, Increase (Decrease)	16	-9
Product Warranty Accrual	$21,775	$14,473

ACQUISITIONS_Details

ACQUISITIONS (Details) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

In Thousands, except Per Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

6-May-13

Mar. 31, 2013

Dec. 31, 2013

Jun. 30, 2013

6-May-13

Dec. 31, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Mar. 18, 2013

Dec. 19, 2012

Mar. 31, 2013

Sep. 30, 2013

Mar. 18, 2013

Dec. 19, 2012

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

General Donlee [Member]

Primus Composites [Member]

Primus Composites [Member]

Embee Incorporated [Member]

Embee Incorporated [Member]

Embee Incorporated [Member]

Embee Incorporated [Member]

Embee Incorporated [Member]

Embee Incorporated [Member]

GPECS [Member]

GPECS [Member]

GPECS [Member]

Embee Incorporated [Member]

Developed Technology Rights [Member]

Customer relationships

Intangible asset - Technology [Domain]

Intangible asset - Technology [Domain]

Property and Equipment [Domain]

Goodwill [Member]

Primus Composites [Member]

GPECS [Member]

Primus Composites [Member]

Primus Composites [Member]

Acquisitions

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual

$15,876

'

$27,214

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Schedule of Finite-Lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:

The following table is a summary of the fair value estimates of the identifiable intangible assets and their estimated useful lives:

Estimated Useful Life

Estimated Fair Value

Estimated Useful Life

Estimated Fair Value

Tradename

Indefinite-lived

$

13,400

Technology

10 years

$

19,100

Customer relationships

10 years

42,101

Customer relationships

20 years

90,000

$

55,501

$

109,100

Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Financial Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2,258

29,511

-17,819

15,670

Business Acquisition, Pro Forma Revenue

967,345

1,008,698

1,916,224

1,965,987

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Schedule of Indefinite-lived Intangible Assets Acquired as Part of Business Combination [Table Text Block]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

13,400

'

'

'

'

'

'

'

'

'

'

Accrued Environmental Loss Contingencies, Noncurrent

'

'

'

'

'

'

'

'

'

'

'

'

'

'

3,505

'

'

2,767

'

'

'

'

'

'

'

Business Acquisition, Transaction Costs

'

'

'

'

'

'

'

'

1,605

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Receivables

'

'

'

'

'

'

'

'

17,349

'

'

'

'

7,013

'

'

'

15,888

'

'

'

'

'

'

'

Payments to Acquire Businesses, Gross

'

'

'

'

'

'

56,622

33,530

'

141,863

'

'

'

'

'

208,650

'

'

'

'

'

'

'

'

'

Business Combination, Consideration Transferred, Liabilities Incurred

'

'

'

'

'

'

32,382

30,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Goodwill, Expected Tax Deductible Amount

'

'

'

'

'

'

'

'

21,202

'

'

'

'

'

'

'

'

94,563

'

'

'

'

'

'

'

Business Combination, Acquisition Related Costs

'

'

'

'

'

'

'

'

'

'

82

'

805

'

'

2,936

510

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Cash and Equivalents

'

'

'

'

'

'

'

'

2,201

'

'

'

'

750

'

'

'

'

'

'

'

'

'

'

'

Acquired Finite-lived Intangible Asset, Weighted Average Useful Life

'

'

'

'

'

'

'

'16 years

'

'10 years

'

'10 years

'

'

'

'18 years 2 months

'

'

'

'10 years

'20 years

'

'

'

'

Revenues

151,146

113,468

296,237

240,579

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Inventory

'

'

'

'

'

'

'

'

19,102

'

'

'

'

411

'

'

'

41,416

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Prepaid Expense and Other Assets

'

'

'

'

'

'

'

'

883

'

'

'

'

'

517

'

'

568

'

'

'

'

'

'

'

Goodwill

1,740,155

'

1,740,155

'

'

1,717,400

'

'

21,202

'

'

'

'

'

69,578

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Assets Noncurrent

'

'

'

'

'

'

'

'

5,537

'

'

'

'

'

'

'

'

34,936

455

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Other Noncurrent Assets

'

'

'

'

'

'

'

'

'

'

'

'

'

'

6,738

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets

'

'

'

'

'

'

'

'

102,125

'

'

'

'

'

'

'

'

323,377

155,323

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Accounts Payable

'

'

'

'

'

'

'

'

10,027

'

'

'

'

'

'

'

'

16,000

1,591

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Liabilities, Other

'

'

'

'

'

'

'

'

23,804

'

'

'

'

'

2,309

'

'

15,738

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities Noncurrent

'

'

'

'

'

'

'

'

4,764

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Other

'

'

'

'

'

'

'

'

'

'

'

'

'

'

9,560

'

'

2,989

'

'

'

'

'

'

'

Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities

'

'

'

'

'

'

'

'

38,595

'

'

'

'

'

13,460

'

'

114,727

'

'

'

'

'

'

'

Finite-Lived Customer Relationships, Gross

'

'

'

'

6,426

'

'

'

'

'

'

'

'

'

42,101

'

'

'

'

'

'

'

'

'

'

Amortization of Acquired Contract Liabilities

'

'

20,115

13,555

'

'

'

'

'

'

'

'

'

'

'

80,000

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Net Income (Loss)

49,516

82,450

129,044

164,340

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Earnings Per Share, Basic

$0.96

$1.66

$2.51

$3.32

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Business Acquisition, Pro Forma Earnings Per Share, Diluted

$0.94

$1.58

$2.44

$3.14

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Goodwill, Purchase Accounting Adjustments

'

'

33

'

'

'

'

'

'

'

'

'

'

'

'

28,193

'

'

'

'

'

'

'

'

'

Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual

($1,633)

'

($2,570)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

DISCONTINUED_OPERATIONS_AND_AS2

DISCONTINUED OPERATIONS AND ASSETS HELD FOR SALE (Details) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2013	Sep. 30, 2013	Sep. 30, 2012
Discontinued operations and assets held for sale	'	'	'
Proceeds from sale of assets	$11,200	$11,713	$460
Proceeds from Sale of Property Held-for-sale	9,676	'	'
Notes Issued	1,500	'	'
Assets Held-for-sale, Current	14,747	0	'
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal	1,462	'	'
Triumph Instruments [Member]	'	'	'
Discontinued operations and assets held for sale	'	'	'
Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net	2,545	'	'
Disposal Group, Including Discontinued Operation, Inventory	7,668	'	'
Disposal Group Including Discountued Operation Rotable Assets	1,957	'	'
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net	2,431	'	'
Disposal Group, Including Discontinued Operation, Other Noncurrent Assets	146	'	'
Assets of Disposal Group, Including Discontinued Operation, Noncurrent	14,747	'	'
Disposal Group, Including Discontinued Operation, Accounts Payable	1,515	'	'
Disposal Group, Including Discontinued Operation, Other Current Liabilities	945	'	'
Disposal Group, Including Discontinued Operation, Other Noncurrent Liabilities	161	'	'
Liabilities of Disposal Group, Including Discontinued Operation, Noncurrent	$2,621	'	'

INVENTORIES_Details

INVENTORIES (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Mar. 31, 2012
In Thousands, unless otherwise specified
Inventory Disclosure [Abstract]	'	'	'
Raw materials	$83,001	$70,242	'
Work-in-process	1,064,644	965,825	'
Finished goods	88,481	75,960	'
Less: unliquidated progress payments	-140,624	-124,128	-124,128
Total inventories	1,095,502	987,899	'
Preproduction Costs Related to Long-term Supply Arrangements, Costs Capitalized	$110,885	$71,167	'

LONGTERM_DEBT_BY_TYPE_Details

LONG-TERM DEBT, BY TYPE (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013
In Thousands, unless otherwise specified
Long-term debt	'	'
Long-term debt	$1,448,292	$1,329,863
Less current portion	48,894	133,930
Long-term Debt and Capital Lease Obligations	1,399,398	1,195,933
Revolving credit facility	'	'
Long-term debt	'	'
Long-term debt	282,455	95,849
Asset-backed Securities [Member]	'	'
Long-term debt	'	'
Long-term debt	160,300	150,000
Capital Lease Obligations [Member]	'	'
Long-term debt	'	'
Long-term debt	68,683	61,449
Secured Promissory Notes [Member]	'	'
Long-term debt	'	'
Long-term debt	0	8,741
Senior subordinated notes due 2017	'	'
Long-term debt	'	'
Long-term debt	173,494	173,344
Senior notes due 2018	'	'
Long-term debt	'	'
Long-term debt	348,275	348,133
Senior notes due 2021 [Member]	'	'
Long-term debt	'	'
Long-term debt	375,000	375,000
Convertible senior subordinated notes	'	'
Long-term debt	'	'
Long-term debt	32,107	109,369
Notes Payable, Other Payables [Member]	'	'
Long-term debt	'	'
Long-term debt	$7,978	$7,978

LONGTERM_DEBT_Details_2

LONG-TERM DEBT (Details 2) (USD $)

6 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

3 Months Ended

12 Months Ended

9 Months Ended

3 Months Ended

3 Months Ended

In Thousands, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Sep. 30, 2006

Sep. 30, 2013

Mar. 31, 2013

Sep. 18, 2006

Jun. 30, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Jun. 30, 2011

Mar. 31, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Mar. 31, 2011

Sep. 30, 2013

Mar. 31, 2013

Dec. 31, 2011

Sep. 30, 2013

Mar. 31, 2013

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Term loan credit agreement

Term loan credit agreement

Asset-backed Securities [Member]

Asset-backed Securities [Member]

Capital Lease Obligations [Member]

Capital Lease Obligations [Member]

Secured Promissory Notes [Member]

Secured Promissory Notes [Member]

Senior subordinated notes due 2017

Senior subordinated notes due 2017

Senior subordinated notes due 2017

Senior notes due 2018

Senior notes due 2018

Senior notes due 2018

Senior notes due 2021 [Member]

Senior notes due 2021 [Member]

Notes Payable, Other Payables [Member]

Notes Payable, Other Payables [Member]

Minimum [Member]

Maximum [Member]

Revolving credit facility

Revolving credit facility

Long-term debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

'

'

$1,000,000

'

$850,000

'

'

$175,000

$175,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Accordion feature

'

'

'

'

'

'

'

'

50,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments of Financing Costs

472

2,244

'

6,252

'

'

'

2,100

'

'

'

'

'

'

196

'

'

'

'

4,390

'

'

7,307

'

'

6,327

'

'

'

'

'

Unamortized financing costs prior to amendment

'

'

'

'

'

'

'

'

'

'

7,000

'

'

'

537

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument principal amount

'

'

'

'

'

'

201,250

'

'

'

'

'

350,000

'

'

'

'

'

'

'

175,000

'

'

350,000

'

375,000

'

'

'

'

'

Gains (Losses) on Extinguishment of Debt

'

'

'

'

'

'

'

'

'

'

'

7,712

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Description of Variable Rate Basis

'

'

'

'

'

'

'

'

'LIBOR

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt Instrument, Basis Spread on Variable Rate

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1.50%

2.75%

Outstanding borrowing amount

1,448,292

'

1,329,863

'

32,107

109,369

'

'

282,455

95,849

'

'

'

160,300

150,000

68,683

61,449

0

8,741

'

173,494

173,344

'

348,275

348,133

375,000

375,000

7,978

7,978

'

'

Letters of credit outstanding amount

'

'

'

'

'

'

'

'

36,374

31,415

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Commitment fees (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.30%

0.50%

Borrowing capacity under revolving credit facility after reductions for borrowings and letters of credit outstanding

'

'

'

'

'

'

'

'

681,171

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Program fee on the amount outstanding (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

0.43%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Commitment Fee Percentage

'

'

'

'

'

'

'

'

'

'

'

'

'

0.43%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of line of credit on which commitment fees are charged (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Current portion of long-term debt

$48,894

'

$133,930

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

LONGTERM_DEBT_Details_3

LONG-TERM DEBT (Details 3) (USD $)

3 Months Ended

6 Months Ended

3 Months Ended

3 Months Ended

6 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

9 Months Ended

3 Months Ended

1 Months Ended

3 Months Ended

6 Months Ended

12 Months Ended

In Thousands, except Share data, unless otherwise specified

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Jun. 30, 2012

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2012

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Sep. 30, 2013

Mar. 31, 2013

Sep. 30, 2013

Jun. 30, 2011

Mar. 31, 2011

Mar. 31, 2013

Sep. 30, 2013

Dec. 31, 2011

Mar. 31, 2013

Mar. 31, 2013

Sep. 30, 2013

Sep. 30, 2006

Dec. 31, 2013

Sep. 30, 2013

Sep. 30, 2012

Sep. 30, 2013

Sep. 30, 2012

Mar. 31, 2013

Mar. 31, 2012

Mar. 31, 2011

Sep. 18, 2006

Sep. 30, 2013

Mar. 31, 2013

Revolving credit facility

Revolving credit facility

Revolving credit facility

Revolving credit facility

Asset-backed Securities [Member]

Asset-backed Securities [Member]

Equipment leasing facility and other capital leases

Equipment leasing facility and other capital leases

Equipment leasing facility and other capital leases

Secured Promissory Notes [Member]

Secured Promissory Notes [Member]

Senior subordinated notes due 2017

Senior subordinated notes due 2017

Senior subordinated notes due 2017

Senior subordinated notes due 2017

Senior notes due 2018

Senior notes due 2018

Senior notes due 2018

Senior notes due 2021 [Member]

Senior notes due 2021 [Member]

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Convertible senior subordinated notes

Notes Payable, Other Payables [Member]

Notes Payable, Other Payables [Member]

trading_days

trading_days

Long-term debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Line of Credit Facility, Maximum Borrowing Capacity

'

'

'

'

'

'

$1,000,000

'

$850,000

$175,000

$175,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term debt

1,448,292

'

1,448,292

'

1,329,863

'

282,455

95,849

'

150,000

160,300

68,683

'

61,449

0

8,741

173,494

'

'

173,344

348,275

'

348,133

375,000

375,000

'

'

32,107

'

32,107

'

109,369

'

'

'

7,978

7,978

Capital lease obligations entered into to finance capital additions

'

'

15,688

11,199

'

'

'

'

'

'

'

36

25

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Debt instrument principal amount

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

175,000

'

'

'

350,000

'

'

375,000

'

'

'

'

'

'

'

'

'

'

201,250

'

'

Debt instrument interest rate stated percentage (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.00%

'

'

'

8.62%

'

'

4.88%

'

'

'

'

'

'

'

'

'

'

'

'

'

Proceeds from loan, percentage of principal (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

98.56%

'

'

'

99.27%

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Payments of Financing Costs

'

'

472

2,244

'

2,100

'

'

'

196

'

'

'

'

'

'

'

'

4,390

'

'

7,307

'

6,327

'

6,252

'

'

'

'

'

'

'

'

'

'

'

Contingent interest rate per annum calculated on the average trading price for the relevant five day trading period (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

0.25%

'

'

'

'

'

'

'

'

'

Trading period used to determine payment of contingent interest (in days)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

5

'

'

'

'

'

'

'

Percentage of principal amount at which the entity may redeem the note before November 15, 2014 (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

104.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of principal amount at which the entity may redeem the note before November 15, 2015 (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

102.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of principal amount at which the entity may redeem the note after November 15, 2015 (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

The maximum percentage of the principal amounts of the debt instrument which the entity may redeem (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

35.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Principal amount of debt purchased

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

17,255

'

'

77,262

19,286

'

50,395

22,200

'

'

'

Debt Instrument, Repurchase Option Percentage of Original Principal

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

Effective interest yield on principal amount (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

8.25%

'

'

'

8.75%

'

'

4.88%

'

'

'

'

'

'

'

'

'

'

'

'

'

Change of control redemption price, percentage of principal (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

101.00%

'

'

'

101.00%

'

'

101.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Percentage of principal amount which triggers payment of contingent interest if it occurs over the specified trading period (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

120.00%

'

'

'

'

'

'

'

'

'

Percentage of principal amount that the holder of the note may require the entity to repurchase the debt instrument on October 1, 2011, 2016, and 2021 (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

Asset sales redemption price, percentage of principal (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

100.00%

'

'

'

'

'

'

'

'

'

'

'

'

'

Net proceeds from sale of notes

'

'

48,588

71,099

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

194,998

'

'

'

'

'

'

'

'

'

'

'

Debt instrument fixed interest rate (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

2.63%

'

'

Amount paid to purchase debt

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

19,414

'

'

'

'

Number of common stock shares per $1,000 principal amount of the convertible notes (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

36.8359

'

'

'

'

'

'

'

'

'

Principal amount of notes which are convertible into 36.731 shares of common stock

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

1

'

1

'

'

'

'

'

'

'

Conversion price (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$27.15

'

$27.15

'

'

'

'

'

'

'

Shares issued to settle the conversion benefit of the notes (in shares)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

394,539,000

'

'

1,849,596

386,936

395,269

772,438

'

'

'

'

Number of days within 30 consecutive trading days in which the closing price of the entity's common stock exceeded the conversion price giving the holders of the notes a put option (in days)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'20 days

'

'

'

'

'

'

'

'

'

Number of consecutive trading days during which the closing price of the entity's common stock exceeded the conversion price for at least 20 days giving the holders of the notes a put option (in days)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

30

'

'

'

'

'

'

'

'

'

Percentage of the closing sales price of the entity's common stock that the conversion price exceeded giving the holders of the notes a put option (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

130.00%

'

'

'

'

'

'

'

'

'

Average price of common stock (in dollars per share)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

$77.10

$60.35

$77.27

$60.42

'

'

'

'

'

'

Additional number of shares included in diluted earning per share calculation (in shares)

766,000

2,258,000

1,229,000

2,357,000

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

766,395

2,258,303

1,229,710

2,357,143

'

'

'

'

'

'

Percentage of principal amount that the holder of the note may require the entity to repurchase due to a fundamental change undergone by the entity, subject to certain conditions (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

100.00%

'

'

'

'

'

'

'

'

'

The limit of the principal amount of the debt instrument which the entity may redeem (as a percent)

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

104.88%

'

'

'

'

'

'

'

'

'

'

'

'

'

Current portion of long-term debt

48,894

'

48,894

'

133,930

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Long-term Debt and Capital Lease Obligations

$1,399,398

'

$1,399,398

'

$1,195,933

'

'

'

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FAIR_VALUE_MEASUREMENTS_Detail

FAIR VALUE MEASUREMENTS (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Oct. 31, 2011	Sep. 30, 2013	Sep. 30, 2013
			Fair value measured on a recurring basis	Fair value measured on a recurring basis	Fair value measured on a recurring basis	Fair value measured on a recurring basis	Aviation Network Services, LLC [Member]	Minimum [Member]	Maximum [Member]
			Significant Unobservable Inputs (Level 3)	Significant Unobservable Inputs (Level 3)	Fair Value, Inputs, Level 2 [Member]	Fair Value, Inputs, Level 2 [Member]
Fair value of assets measured on a recurring basis	'	'	'	'	'	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	($1,638)	($2,471)	($1,638)	($2,614)	'	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases, Sales, Issues, Settlements	1,100	0	'	'	'	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings	-124	-452	'	'	'	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0	'	'	'	'	'	'	'
Fair Value, Measurement with Unobservable Inputs Reconciliations, Recurring Basis, Liability Value	-2,614	-2,019	-1,638	-2,614	'	'	'	'	'
Contingent consideration	'	'	'	'	'	'	-1,926	'	'
Business Acquisition, Contingent Consideration, Potential Cash Payment	'	'	'	'	'	'	'	0	'
Derivative Asset, Fair Value, Gross Asset	'	'	'	'	-222	-209	'	'	'
Notional Amount of Foreign Currency Derivatives	9,542	'	'	'	'	'	'	'	'
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	141	'	'	'	'	'	'	'	'
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	'	'	'	'	'	'	'	'	1,900
Derivative Instruments in Hedges, Liabilities, at Fair Value	'	'	'	'	($102)	$0	'	'	'

FAIR_VALUE_MEASUREMENTS_Detail1

FAIR VALUE MEASUREMENTS (Details 2) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2013	Oct. 31, 2011	Sep. 30, 2013
In Thousands, unless otherwise specified			Carrying Value	Carrying Value	Total Fair Value	Total Fair Value	Aviation Network Services, LLC [Member]	Aviation Network Services, LLC [Member]	Non-hedge Derivative [Domain]
Carrying amounts and related estimated fair values of financial instruments not recorded at fair value in financial statements	'	'	'	'	'	'	'	'	'
Derivative Liability, Notional Amount	$9,542	'	'	'	'	'	'	'	$106,767
Business Combination, Contingent Consideration, Liability	'	'	'	'	'	'	'	1,926	'
Long-term debt	1,448,292	1,329,863	1,448,292	1,329,863	1,524,557	1,594,800	'	'	'
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	'	'	'	'	'	'	$1,100	'	'

EARNINGS_PER_SHARE_Details

EARNINGS PER SHARE (Details)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]	'	'	'	'
Weighted-average common shares outstanding-basic (in shares)	51,807	49,657	51,311	49,536
Net effect of dilutive stock options (in shares)	247	373	273	387
Potential common shares - convertible debt (in shares)	766	2,258	1,229	2,357
Weighted average common shares outstanding - diluted (in shares)	52,820	52,288	52,813	52,280

INCOME_TAXES_Details

INCOME TAXES (Details) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013
Income Tax Disclosure [Abstract]	'	'	'	'	'	'
Total accrued income tax related interest and penalties	$155	'	'	$155	'	$236
Total amount of unrecognized tax benefits	7,850	'	'	7,850	'	7,728
Amount of unrecognized tax benefits that would impact the effective tax rate, if recognized	6,066	'	'	6,066	'	5,945
Effective income tax rate (as a percent)	31.80%	'	36.50%	33.80%	37.40%	'
Income Tax Reconciliation, Nondeductible Expense	$2,345	$704	'	'	'	'
Number of states which notified the entity of an income tax examination	1	'	'	'	'	'

GOODWILL_Details

GOODWILL (Details) (USD $)	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Goodwill	'
Goodwill, Acquired During Period	$21,202
Goodwill, Purchase Accounting Adjustments	33
Changes in the carrying value of goodwill	'
Balance at the beginning of the period	1,717,400
Effect of exchange rate changes and other	1,520
Balance at the end of the period	1,740,155
Aerostructures	'
Goodwill	'
Goodwill, Acquired During Period	21,202
Goodwill, Purchase Accounting Adjustments	33
Changes in the carrying value of goodwill	'
Balance at the beginning of the period	1,316,450
Effect of exchange rate changes and other	-706
Balance at the end of the period	1,336,979
Aerospace Systems [Member]	'
Goodwill	'
Goodwill, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	0
Changes in the carrying value of goodwill	'
Balance at the beginning of the period	344,964
Effect of exchange rate changes and other	2,226
Balance at the end of the period	347,190
Aftermarket Services	'
Goodwill	'
Goodwill, Acquired During Period	0
Goodwill, Purchase Accounting Adjustments	0
Changes in the carrying value of goodwill	'
Balance at the beginning of the period	55,986
Effect of exchange rate changes and other	0
Balance at the end of the period	$55,986

PENSION_AND_OTHER_POSTRETIREME2

PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS (Details) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Components of net periodic benefit costs:	'	'	'	'	'
Defined Benefit Plan, Special Termination Benefits	$0	($1,957)	'	$0	($3,107)
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	1,957	1,150	'	'
Pension benefits	'	'	'	'	'
Components of net periodic benefit costs:	'	'	'	'	'
Defined Benefit Plan, Special Termination Benefits	'	1,957	'	'	'
Service cost	3,293	4,626	'	6,586	9,252
Interest cost	23,216	24,587	'	46,432	49,174
Expected return on plan assets	37,018	34,333	'	74,036	68,667
Amortization of prior service costs	-1,683	-1,458	'	-3,366	-2,915
Amortization of net loss	4,531	79	'	9,062	159
Defined Benefit Plan, Special Termination Benefits	0	'	'	0	3,107
Net periodic benefit cost	-7,661	-4,542	'	-15,322	-9,890
Other postretirement	'	'	'	'	'
Components of net periodic benefit costs:	'	'	'	'	'
Service cost	765	884	'	1,530	1,769
Interest cost	3,138	3,941	'	6,276	7,881
Amortization of prior service costs	-1,132	-1,133	'	-2,264	-2,265
Net periodic benefit cost	2,771	3,692	'	5,542	7,385
Special Termination Benefits [Member]	'	'	'	'	'
Components of net periodic benefit costs:	'	'	'	'	'
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	1,957	'	'	'
Severance Charges [Member]	'	'	'	'	'
Components of net periodic benefit costs:	'	'	'	'	'
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	$1,182	'	'	'

STOCKHOLDERS_EQUITY_Details

STOCKHOLDERS' EQUITY (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]	'	'	'	'
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax	$2,831	'	$5,662	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	3,279	'	2,770	'
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	0	'	-235	'
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	3,279	'	2,535	'
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, Net of Tax	0	'	0	'
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Net of Tax	-51	-20	-36	-32
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,021	'	2,108	'
Other Comprehensive Income (Loss), Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service (Cost) Credit, Tax	$1,700	'	$3,400	'

SEGMENTS_Details

SEGMENTS (Details) (USD $)	3 Months Ended		6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2013
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Defined Benefit Plan, Special Termination Benefits	$0	($1,957)	$0	($3,107)	'
Net sales	967,345	938,181	1,911,028	1,825,869	'
Operating income (loss)	92,971	142,947	234,317	283,889	'
Interest expense and other	20,321	16,668	40,031	33,900	'
Income from continuing operations before income taxes	72,650	126,279	194,286	249,989	'
Depreciation and amortization	38,244	31,998	76,178	63,813	'
Amortization of Acquired Contract Liabilities	'	'	20,115	13,555	'
EBITDA	122,250	170,339	290,380	337,254	'
Capital expenditures	63,036	24,088	119,265	61,193	'
Total assets	5,312,274	'	5,312,274	'	5,184,294
Revenues	151,146	113,468	296,237	240,579	'
Aerostructures	'	'	'	'	'
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Net sales	690,748	713,978	1,342,636	1,383,831	'
Operating income (loss)	64,425	121,385	164,812	241,523	'
Depreciation and amortization	26,483	24,049	52,796	47,953	'
Amortization of Acquired Contract Liabilities	5,614	6,563	11,755	13,555	'
EBITDA	85,294	138,871	205,853	275,921	'
Capital expenditures	52,598	16,413	98,543	46,425	'
Total assets	3,818,050	'	3,818,050	'	3,707,527
Aerospace Systems	'	'	'	'	'
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Net sales	205,483	150,139	425,009	290,651	'
Operating income (loss)	31,740	25,712	74,383	49,177	'
Depreciation and amortization	8,549	4,489	17,088	8,963	'
Amortization of Acquired Contract Liabilities	3,351	'	8,360	'	'
EBITDA	36,938	30,201	83,111	58,140	'
Capital expenditures	5,843	3,810	10,275	6,599	'
Total assets	1,056,257	'	1,056,257	'	1,040,821
Aftermarket Services	'	'	'	'	'
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Net sales	72,971	76,061	147,324	156,038	'
Operating income (loss)	10,102	10,767	21,381	22,574	'
Depreciation and amortization	1,864	2,288	3,741	4,614	'
EBITDA	11,966	13,055	25,122	27,188	'
Capital expenditures	3,915	3,378	8,066	7,475	'
Total assets	318,856	'	318,856	'	327,609
Elimination of inter-segment sales	'	'	'	'	'
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Net sales	-1,857	-1,997	-3,941	-4,651	'
Corporate	'	'	'	'	'
Financial information of reportable segment and the reconciliation of EBITDA to operating income	'	'	'	'	'
Operating income (loss)	-13,296	-14,917	-26,259	-29,385	'
Depreciation and amortization	1,348	1,172	2,553	2,283	'
EBITDA	-11,948	-11,788	-23,706	-23,995	'
Capital expenditures	680	487	2,381	694	'
Total assets	$119,111	'	$119,111	'	$108,337

SELECTED_CONSOLIDATING_FINANCI2

SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Details) (USD $)	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Mar. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'	'	'
Cash and cash equivalents	$22,443	$32,037	$30,651	$29,662
Trade and other receivables, net	434,860	433,984	'	'
Inventories	1,095,502	987,899	'	'
Rotable assets	38,172	34,853	'	'
Deferred income taxes	51,140	99,546	'	'
Prepaid expenses and other	20,072	23,593	'	'
Assets Held-for-sale, Current	0	14,747	'	'
Total current assets	1,662,189	1,626,659	'	'
Property and equipment, net	898,631	815,084	'	'
Goodwill and other intangible assets, net	2,683,187	2,675,759	'	'
Other, net	68,267	66,792	'	'
Intercompany investments and advances	0	0	'	'
Total assets	5,312,274	5,184,294	'	'
Current liabilities:	'	'	'	'
Current portion of long-term debt	48,894	133,930	'	'
Accounts payable	290,188	327,426	'	'
Accrued expenses	264,546	276,668	'	'
Liabilities of Assets Held-for-sale	0	2,621	'	'
Total current liabilities	603,628	740,645	'	'
Long-term debt, less current portion	1,399,398	1,195,933	'	'
Intercompany debt	0	0	'	'
Accrued pension and other postretirement benefits, noncurrent	597,709	671,175	'	'
Deferred income taxes and other	524,424	531,383	'	'
Total stockholders' equity	2,187,115	2,045,158	'	'
Total liabilities and stockholders' equity	5,312,274	5,184,294	'	'
Parent	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	3,120	3,110	3,483	7,969
Trade and other receivables, net	1,264	1,141	'	'
Inventories	0	0	'	'
Rotable assets	0	0	'	'
Deferred income taxes	51,129	0	'	'
Prepaid expenses and other	5,152	5,533	'	'
Assets Held-for-sale, Current	'	0	'	'
Total current assets	60,665	9,784	'	'
Property and equipment, net	10,567	9,999	'	'
Goodwill and other intangible assets, net	0	335	'	'
Other, net	56,885	58,526	'	'
Intercompany investments and advances	3,339,235	3,137,667	'	'
Total assets	3,467,352	3,216,311	'	'
Current liabilities:	'	'	'	'
Current portion of long-term debt	32,360	109,648	'	'
Accounts payable	0	9,400	'	'
Accrued expenses	47,400	35,894	'	'
Liabilities of Assets Held-for-sale	'	0	'	'
Total current liabilities	79,760	154,942	'	'
Long-term debt, less current portion	1,184,969	998,200	'	'
Intercompany debt	0	0	'	'
Accrued pension and other postretirement benefits, noncurrent	7,376	7,264	'	'
Deferred income taxes and other	8,132	10,747	'	'
Total stockholders' equity	2,187,115	2,045,158	'	'
Total liabilities and stockholders' equity	3,467,352	3,216,311	'	'
Guarantors Subsidiaries	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	818	1,537	514	2,237
Trade and other receivables, net	194,246	171,186	'	'
Inventories	1,046,062	957,077	'	'
Rotable assets	24,619	24,903	'	'
Deferred income taxes	0	99,546	'	'
Prepaid expenses and other	10,802	15,170	'	'
Assets Held-for-sale, Current	'	14,747	'	'
Total current assets	1,276,547	1,284,166	'	'
Property and equipment, net	805,635	753,510	'	'
Goodwill and other intangible assets, net	2,604,946	2,629,908	'	'
Other, net	8,865	7,873	'	'
Intercompany investments and advances	96,691	325,786	'	'
Total assets	4,792,684	5,001,243	'	'
Current liabilities:	'	'	'	'
Current portion of long-term debt	16,534	24,282	'	'
Accounts payable	273,032	309,363	'	'
Accrued expenses	193,874	231,260	'	'
Liabilities of Assets Held-for-sale	'	2,621	'	'
Total current liabilities	483,440	567,526	'	'
Long-term debt, less current portion	54,129	47,733	'	'
Intercompany debt	2,052,759	2,193,874	'	'
Accrued pension and other postretirement benefits, noncurrent	590,333	663,911	'	'
Deferred income taxes and other	511,728	521,885	'	'
Total stockholders' equity	1,100,295	1,006,314	'	'
Total liabilities and stockholders' equity	4,792,684	5,001,243	'	'
Non-Guarantor Subsidiaries	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	18,505	27,390	26,654	19,456
Trade and other receivables, net	239,350	261,657	'	'
Inventories	49,440	30,822	'	'
Rotable assets	13,553	9,950	'	'
Deferred income taxes	11	0	'	'
Prepaid expenses and other	4,118	2,890	'	'
Assets Held-for-sale, Current	'	0	'	'
Total current assets	324,977	332,709	'	'
Property and equipment, net	82,429	51,575	'	'
Goodwill and other intangible assets, net	78,241	45,516	'	'
Other, net	2,517	393	'	'
Intercompany investments and advances	5,369	2,777	'	'
Total assets	493,533	432,970	'	'
Current liabilities:	'	'	'	'
Current portion of long-term debt	0	0	'	'
Accounts payable	17,156	8,663	'	'
Accrued expenses	23,272	9,514	'	'
Liabilities of Assets Held-for-sale	'	0	'	'
Total current liabilities	40,428	18,177	'	'
Long-term debt, less current portion	160,300	150,000	'	'
Intercompany debt	179,085	202,621	'	'
Accrued pension and other postretirement benefits, noncurrent	0	0	'	'
Deferred income taxes and other	16,845	0	'	'
Total stockholders' equity	96,875	62,172	'	'
Total liabilities and stockholders' equity	493,533	432,970	'	'
Eliminations	'	'	'	'
Current assets:	'	'	'	'
Cash and cash equivalents	0	0	0	0
Trade and other receivables, net	0	0	'	'
Inventories	0	0	'	'
Rotable assets	0	0	'	'
Deferred income taxes	0	0	'	'
Prepaid expenses and other	0	0	'	'
Assets Held-for-sale, Current	'	0	'	'
Total current assets	0	0	'	'
Property and equipment, net	0	0	'	'
Goodwill and other intangible assets, net	0	0	'	'
Other, net	0	0	'	'
Intercompany investments and advances	-3,441,295	-3,466,230	'	'
Total assets	-3,441,295	-3,466,230	'	'
Current liabilities:	'	'	'	'
Current portion of long-term debt	0	0	'	'
Accounts payable	0	0	'	'
Accrued expenses	0	0	'	'
Liabilities of Assets Held-for-sale	'	0	'	'
Total current liabilities	0	0	'	'
Long-term debt, less current portion	0	0	'	'
Intercompany debt	-2,231,844	-2,396,495	'	'
Accrued pension and other postretirement benefits, noncurrent	0	0	'	'
Deferred income taxes and other	-12,281	-1,249	'	'
Total stockholders' equity	-1,197,170	-1,068,486	'	'
Total liabilities and stockholders' equity	($3,441,295)	($3,466,230)	'	'

SELECTED_CONSOLIDATING_FINANCI3

SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Details 2) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	$967,345	$938,181	'	$1,911,028	$1,825,869
Operating costs and expenses:	'	'	'	'	'
Cost of sales	771,318	703,654	'	1,467,789	1,354,931
Selling, general and administrative	63,583	56,193	'	130,300	118,152
Depreciation and amortization	38,244	31,998	'	76,178	63,813
Relocation Charges	1,229	0	'	2,444	0
Acquisition and integration expenses	0	1,432	'	0	1,977
Defined Benefit Plan, Special Termination Benefits	0	-1,957	'	0	-3,107
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	1,957	1,150	'	'
Total operating costs and expenses	874,374	795,234	'	1,676,711	1,541,980
Operating income (loss)	92,971	142,947	'	234,317	283,889
Intercompany interest and charges	0	0	'	0	0
Interest expense and other	20,321	16,668	'	40,031	33,900
Income (loss) from continuing operations, before income taxes	72,650	126,279	'	194,286	249,989
Income tax expense (benefit)	23,134	46,088	'	65,727	93,466
Net income	49,516	80,191	'	128,559	156,523
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	4,300	2,615	'	4,643	-3,472
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	53,816	82,806	'	133,202	153,051
Parent	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	0	0	'	0	0
Operating costs and expenses:	'	'	'	'	'
Cost of sales	0	0	'	0	0
Selling, general and administrative	10,185	10,189	'	20,776	20,775
Depreciation and amortization	788	610	'	1,422	1,209
Relocation Charges	0	'	'	0	'
Acquisition and integration expenses	'	0	'	'	295
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	3,107
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	1,957	'	'	'
Total operating costs and expenses	10,973	12,756	'	22,198	25,386
Operating income (loss)	-10,973	-12,756	'	-22,198	-25,386
Intercompany interest and charges	-53,356	-49,217	'	-110,746	-98,554
Interest expense and other	19,304	15,143	'	37,952	30,642
Income (loss) from continuing operations, before income taxes	23,079	21,318	'	50,596	42,526
Income tax expense (benefit)	3,140	8,709	'	11,532	18,889
Net income	19,939	12,609	'	39,064	23,637
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0	'	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	19,939	12,609	'	39,064	23,637
Guarantors Subsidiaries	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	924,624	914,943	'	1,827,850	1,777,419
Operating costs and expenses:	'	'	'	'	'
Cost of sales	736,898	687,053	'	1,404,453	1,321,190
Selling, general and administrative	46,740	41,412	'	97,466	87,585
Depreciation and amortization	35,429	30,282	'	71,061	60,415
Relocation Charges	1,229	'	'	2,444	'
Acquisition and integration expenses	'	1,432	'	'	1,682
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	0	'	'	'
Total operating costs and expenses	820,296	760,179	'	1,575,424	1,470,872
Operating income (loss)	104,328	154,764	'	252,426	306,547
Intercompany interest and charges	52,101	48,441	'	108,531	96,952
Interest expense and other	1,833	2,062	'	3,567	4,493
Income (loss) from continuing operations, before income taxes	50,394	104,261	'	140,328	205,102
Income tax expense (benefit)	19,890	37,140	'	53,721	73,984
Net income	30,504	67,121	'	86,607	131,118
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	1,021	-1,478	'	1,873	-3,143
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	31,525	65,643	'	88,480	127,975
Non-Guarantor Subsidiaries	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	44,080	24,274	'	85,721	51,175
Operating costs and expenses:	'	'	'	'	'
Cost of sales	35,779	17,637	'	65,879	36,466
Selling, general and administrative	6,658	4,592	'	12,058	9,792
Depreciation and amortization	2,027	1,106	'	3,695	2,189
Relocation Charges	0	'	'	0	'
Acquisition and integration expenses	'	0	'	'	0
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Defined Benefit Plan, Cost of Providing Special or Contractual Termination Benefits Recognized During Period	'	0	'	'	'
Total operating costs and expenses	44,464	23,335	'	81,632	48,447
Operating income (loss)	-384	939	'	4,089	2,728
Intercompany interest and charges	1,255	776	'	2,215	1,602
Interest expense and other	-816	-537	'	-1,488	-1,235
Income (loss) from continuing operations, before income taxes	-823	700	'	3,362	2,361
Income tax expense (benefit)	104	239	'	474	593
Net income	-927	461	'	2,888	1,768
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	3,279	4,093	'	2,770	-329
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	2,352	4,554	'	5,658	1,439
Eliminations	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	-1,359	-1,036	'	-2,543	-2,725
Operating costs and expenses:	'	'	'	'	'
Cost of sales	-1,359	-1,036	'	-2,543	-2,725
Selling, general and administrative	0	0	'	0	0
Depreciation and amortization	0	0	'	'	0
Relocation Charges	0	'	'	0	'
Acquisition and integration expenses	'	0	'	'	0
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Total operating costs and expenses	-1,359	-1,036	'	-2,543	-2,725
Operating income (loss)	0	0	'	0	0
Intercompany interest and charges	0	0	'	0	0
Interest expense and other	0	0	'	0	0
Income (loss) from continuing operations, before income taxes	0	0	'	0	0
Income tax expense (benefit)	0	0	'	0	0
Net income	0	0	'	0	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	0	0	'	0	0
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$0	$0	'	$0	$0

SELECTED_CONSOLIDATING_FINANCI4

SELECTED CONSOLIDATING FINANCIAL STATEMENTS OF PARENT, GUARANTORS AND NON-GUARANTORS (Details 3) (USD $)	3 Months Ended			6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	$967,345	'	$938,181	$1,911,028	$1,825,869
Net income (loss)	49,516	'	80,191	128,559	156,523
Adjustments to reconcile net income to net cash (used in) provided by operating activities	'	'	'	-84,937	-23,608
Net cash (used in) provided by operating activities	'	'	'	43,622	132,915
Capital expenditures	-63,036	'	-24,088	-119,265	-61,193
Reimbursement Revenue	'	'	2,028	5,037	2,028
Proceeds from sale of assets	'	11,200	'	11,713	460
Acquisitions, net of cash acquired	'	'	'	-31,329	0
Net cash used in investing activities	'	'	'	-133,844	-58,705
Net increase in revolving credit facility	'	'	'	186,606	-81,709
Proceeds on issuance of debt	'	'	'	48,588	71,099
Retirements and repayments of debt	'	'	'	-148,226	-55,853
Payment of deferred financing costs	'	'	'	-472	-2,244
Dividends paid	'	'	'	-4,149	-3,997
Repurchase of restricted shares for minimum tax obligation	'	'	'	-2,726	-1,840
Proceeds on government grant	'	'	'	100	1,000
Proceeds from exercise of stock options, including excess tax benefit	'	'	'	180	270
Intercompany financing and advances	'	'	'	0	0
Net cash (used in) provided by financing activities	'	'	'	79,901	-73,274
Effect of exchange rate changes on cash and cash equivalents	'	'	'	727	53
Net change in cash and cash equivalents	'	'	'	-9,594	989
Cash at beginning of period	'	'	'	32,037	29,662
Cash at end of period	22,443	32,037	30,651	22,443	30,651
Cost of sales	771,318	'	703,654	1,467,789	1,354,931
Selling, general and administrative	63,583	'	56,193	130,300	118,152
Depreciation, Depletion and Amortization	38,244	'	31,998	76,178	63,813
Business Combination, Integration Related Costs	0	'	1,432	0	1,977
Defined Benefit Plan, Special Termination Benefits	0	'	1,957	0	3,107
Costs and Expenses	874,374	'	795,234	1,676,711	1,541,980
Operating (loss) income	92,971	'	142,947	234,317	283,889
Intercompany interest and charges	0	'	0	0	0
Interest expense and other	20,321	'	16,668	40,031	33,900
Income before income taxes	72,650	'	126,279	194,286	249,989
Income tax expense	23,134	'	46,088	65,727	93,466
Other comprehensive loss	4,300	'	2,615	4,643	-3,472
Total comprehensive income	53,816	'	82,806	133,202	153,051
Parent	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	0	'	0	0	0
Net income (loss)	19,939	'	12,609	39,064	23,637
Adjustments to reconcile net income to net cash (used in) provided by operating activities	'	'	'	17,740	1,011
Net cash (used in) provided by operating activities	'	'	'	56,804	24,648
Capital expenditures	'	'	'	-1,654	-273
Reimbursement Revenue	'	'	0	0	0
Proceeds from sale of assets	'	'	'	0	'
Net cash used in investing activities	'	'	'	-1,654	-273
Net increase in revolving credit facility	'	'	'	186,606	-81,709
Proceeds on issuance of debt	'	'	'	0	0
Retirements and repayments of debt	'	'	'	-77,416	-19,059
Payment of deferred financing costs	'	'	'	-472	-2,244
Dividends paid	'	'	'	-4,149	-3,997
Repurchase of restricted shares for minimum tax obligation	'	'	'	-2,726	-1,840
Proceeds from exercise of stock options, including excess tax benefit	'	'	'	180	270
Intercompany financing and advances	'	'	'	-157,163	79,718
Net cash (used in) provided by financing activities	'	'	'	-55,140	-28,861
Effect of exchange rate changes on cash and cash equivalents	'	'	'	0	0
Net change in cash and cash equivalents	'	'	'	10	-4,486
Cash at beginning of period	'	'	'	3,110	7,969
Cash at end of period	3,120	'	3,483	3,120	3,483
Cost of sales	0	'	0	0	0
Selling, general and administrative	10,185	'	10,189	20,776	20,775
Depreciation, Depletion and Amortization	788	'	610	1,422	1,209
Business Combination, Integration Related Costs	'	'	0	'	295
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	-3,107
Costs and Expenses	10,973	'	12,756	22,198	25,386
Operating (loss) income	-10,973	'	-12,756	-22,198	-25,386
Intercompany interest and charges	-53,356	'	-49,217	-110,746	-98,554
Interest expense and other	19,304	'	15,143	37,952	30,642
Income before income taxes	23,079	'	21,318	50,596	42,526
Income tax expense	3,140	'	8,709	11,532	18,889
Other comprehensive loss	0	'	0	0	0
Total comprehensive income	19,939	'	12,609	39,064	23,637
Guarantors Subsidiaries	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	924,624	'	914,943	1,827,850	1,777,419
Net income (loss)	30,504	'	67,121	86,607	131,118
Adjustments to reconcile net income to net cash (used in) provided by operating activities	'	'	'	-141,989	-40,699
Net cash (used in) provided by operating activities	'	'	'	-55,382	90,419
Capital expenditures	'	'	'	-111,806	-58,686
Reimbursement Revenue	'	'	2,028	5,037	455
Proceeds from sale of assets	'	'	'	11,707	'
Acquisitions, net of cash acquired	'	'	'	0	'
Net cash used in investing activities	'	'	'	-95,062	-56,203
Net increase in revolving credit facility	'	'	'	0	0
Proceeds on issuance of debt	'	'	'	15,688	11,199
Retirements and repayments of debt	'	'	'	-18,210	-6,694
Payment of deferred financing costs	'	'	'	0	0
Dividends paid	'	'	'	0	0
Repurchase of restricted shares for minimum tax obligation	'	'	'	0	0
Proceeds from exercise of stock options, including excess tax benefit	'	'	'	0	0
Intercompany financing and advances	'	'	'	152,147	-41,444
Net cash (used in) provided by financing activities	'	'	'	149,725	-35,939
Effect of exchange rate changes on cash and cash equivalents	'	'	'	0	0
Net change in cash and cash equivalents	'	'	'	-719	-1,723
Cash at beginning of period	'	'	'	1,537	2,237
Cash at end of period	818	'	514	818	514
Cost of sales	736,898	'	687,053	1,404,453	1,321,190
Selling, general and administrative	46,740	'	41,412	97,466	87,585
Depreciation, Depletion and Amortization	35,429	'	30,282	71,061	60,415
Business Combination, Integration Related Costs	'	'	1,432	'	1,682
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Costs and Expenses	820,296	'	760,179	1,575,424	1,470,872
Operating (loss) income	104,328	'	154,764	252,426	306,547
Intercompany interest and charges	52,101	'	48,441	108,531	96,952
Interest expense and other	1,833	'	2,062	3,567	4,493
Income before income taxes	50,394	'	104,261	140,328	205,102
Income tax expense	19,890	'	37,140	53,721	73,984
Other comprehensive loss	1,021	'	-1,478	1,873	-3,143
Total comprehensive income	31,525	'	65,643	88,480	127,975
Non-Guarantor Subsidiaries	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	44,080	'	24,274	85,721	51,175
Net income (loss)	-927	'	461	2,888	1,768
Adjustments to reconcile net income to net cash (used in) provided by operating activities	'	'	'	40,736	16,080
Net cash (used in) provided by operating activities	'	'	'	43,624	17,848
Capital expenditures	'	'	'	-5,805	-2,234
Reimbursement Revenue	'	'	0	0	-5
Proceeds from sale of assets	'	'	'	6	'
Net cash used in investing activities	'	'	'	-37,128	-2,229
Net increase in revolving credit facility	'	'	'	0	0
Proceeds on issuance of debt	'	'	'	32,900	59,900
Retirements and repayments of debt	'	'	'	-52,600	-30,100
Payment of deferred financing costs	'	'	'	0	0
Dividends paid	'	'	'	0	0
Repurchase of restricted shares for minimum tax obligation	'	'	'	0	0
Proceeds from exercise of stock options, including excess tax benefit	'	'	'	0	0
Intercompany financing and advances	'	'	'	3,592	-38,274
Net cash (used in) provided by financing activities	'	'	'	-16,108	-8,474
Effect of exchange rate changes on cash and cash equivalents	'	'	'	727	53
Net change in cash and cash equivalents	'	'	'	-8,885	7,198
Cash at beginning of period	'	'	'	27,390	19,456
Cash at end of period	18,505	'	26,654	18,505	26,654
Cost of sales	35,779	'	17,637	65,879	36,466
Selling, general and administrative	6,658	'	4,592	12,058	9,792
Depreciation, Depletion and Amortization	2,027	'	1,106	3,695	2,189
Business Combination, Integration Related Costs	'	'	0	'	0
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Costs and Expenses	44,464	'	23,335	81,632	48,447
Operating (loss) income	-384	'	939	4,089	2,728
Intercompany interest and charges	1,255	'	776	2,215	1,602
Interest expense and other	-816	'	-537	-1,488	-1,235
Income before income taxes	-823	'	700	3,362	2,361
Income tax expense	104	'	239	474	593
Other comprehensive loss	3,279	'	4,093	2,770	-329
Total comprehensive income	2,352	'	4,554	5,658	1,439
Eliminations	'	'	'	'	'
Consolidating Financial Statements, Captions	'	'	'	'	'
Net sales	-1,359	'	-1,036	-2,543	-2,725
Net income (loss)	0	'	0	0	0
Adjustments to reconcile net income to net cash (used in) provided by operating activities	'	'	'	-1,424	0
Net cash (used in) provided by operating activities	'	'	'	-1,424	0
Capital expenditures	'	'	'	0	0
Reimbursement Revenue	'	'	0	0	0
Proceeds from sale of assets	'	'	'	0	'
Net cash used in investing activities	'	'	'	0	0
Net increase in revolving credit facility	'	'	'	0	0
Proceeds on issuance of debt	'	'	'	0	0
Retirements and repayments of debt	'	'	'	0	0
Payment of deferred financing costs	'	'	'	0	0
Dividends paid	'	'	'	0	0
Repurchase of restricted shares for minimum tax obligation	'	'	'	0	0
Proceeds from exercise of stock options, including excess tax benefit	'	'	'	0	0
Intercompany financing and advances	'	'	'	1,424	0
Net cash (used in) provided by financing activities	'	'	'	1,424	0
Effect of exchange rate changes on cash and cash equivalents	'	'	'	0	0
Net change in cash and cash equivalents	'	'	'	0	0
Cash at beginning of period	'	'	'	0	0
Cash at end of period	0	'	0	0	0
Cost of sales	-1,359	'	-1,036	-2,543	-2,725
Selling, general and administrative	0	'	0	0	0
Depreciation, Depletion and Amortization	0	'	0	'	0
Business Combination, Integration Related Costs	'	'	0	'	0
Defined Benefit Plan, Special Termination Benefits	'	'	'	'	0
Costs and Expenses	-1,359	'	-1,036	-2,543	-2,725
Operating (loss) income	0	'	0	0	0
Intercompany interest and charges	0	'	0	0	0
Interest expense and other	0	'	0	0	0
Income before income taxes	0	'	0	0	0
Income tax expense	0	'	0	0	0
Other comprehensive loss	0	'	0	0	0
Total comprehensive income	$0	'	$0	$0	$0

Relocation_Costs_Details

Relocation Costs (Details) (USD $)	3 Months Ended	6 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]	'	'
Restructuring and Related Cost, Incurred Cost	$1,229	$2,444
Restructuring and Related Cost, Expected Cost	'	28,000
Restructuring and Related Cost, Expected Cost Remaining	'	$40,000

SUBSEQUENT_EVENTS_SUBSEQUENT_E

SUBSEQUENT EVENTS SUBSEQUENT EVENTS (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
	General Donlee [Member]	GPECS [Member]
Business Acquisition [Line Items]	'	'
Payments to Acquire Businesses, Gross	$56,622	$208,650
Business Combination, Consideration Transferred, Liabilities Incurred	$32,382	'