CONSOLIDATING GUARANTOR AND NON-GUARANTOR FINANCIAL INFORMATION (Details) - Summary of Condensed Consolidating Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012
CURRENT ASSETS
Cash and equivalents	$ 95,374	$ 178,130	$ 150,065	$ 209,654
Accounts receivable, net of allowances	245,246	256,215
Contract costs and recognized income not yet billed, net of progress payments	111,353	109,828
Inventories, net	266,921	230,120
Prepaid and other current assets	50,440	48,903
Assets of discontinued operations	1,212	1,214
Total Current Assets	770,546	824,410
PROPERTY, PLANT AND EQUIPMENT, net	355,315	353,593
GOODWILL	368,537	357,730
INTANGIBLE ASSETS, net	226,079	221,391
INTERCOMPANY RECEIVABLE	0	0
EQUITY INVESTMENTS IN SUBSIDIARIES	0	0
OTHER ASSETS	28,621	28,580
ASSETS OF DISCONTINUED OPERATIONS	3,061	3,075
Total Assets	1,752,159	1,788,779
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	18,060	10,768
Accounts payable and accrued liabilities	248,598	270,353
Liabilities of discontinued operations	3,142	3,288
Total Current Liabilities	269,800	284,409
LONG-TERM DEBT, net of debt discounts	715,096	678,487
INTERCOMPANY PAYABLES	0	0
OTHER LIABILITIES	167,593	170,675
LIABILITIES OF DISCONTINUED OPERATIONS	4,577	4,744
Total Liabilities	1,157,066	1,138,315
SHAREHOLDERS’ EQUITY	595,093	650,464
Total Liabilities and Shareholders’ Equity	1,752,159	1,788,779
Parent Company [Member]
CURRENT ASSETS
Cash and equivalents	32,424	68,994	88,662	125,093
Accounts receivable, net of allowances	0	0
Contract costs and recognized income not yet billed, net of progress payments	0	0
Inventories, net	0	0
Prepaid and other current assets	(1,180)	(712)
Assets of discontinued operations	0	0
Total Current Assets	31,244	68,282
PROPERTY, PLANT AND EQUIPMENT, net	1,213	972
GOODWILL	0
INTANGIBLE ASSETS, net	0	0
INTERCOMPANY RECEIVABLE	537,068	547,903
EQUITY INVESTMENTS IN SUBSIDIARIES	2,230,698	2,217,864
OTHER ASSETS	45,329	45,968
ASSETS OF DISCONTINUED OPERATIONS	0	0
Total Assets	2,845,552	2,880,989
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	1,515	1,000
Accounts payable and accrued liabilities	27,886	41,121
Liabilities of discontinued operations	0	0
Total Current Liabilities	29,401	42,121
LONG-TERM DEBT, net of debt discounts	678,306	656,852
INTERCOMPANY PAYABLES	21,197	20,607
OTHER LIABILITIES	63,765	65,455
LIABILITIES OF DISCONTINUED OPERATIONS	0	0
Total Liabilities	792,669	785,035
SHAREHOLDERS’ EQUITY	2,052,883	2,095,954
Total Liabilities and Shareholders’ Equity	2,845,552	2,880,989
Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and equivalents	21,955	25,343	18,705	34,782
Accounts receivable, net of allowances	198,472	213,506
Contract costs and recognized income not yet billed, net of progress payments	111,010	109,683
Inventories, net	205,617	173,406
Prepaid and other current assets	21,424	21,854
Assets of discontinued operations	0	0
Total Current Assets	558,478	543,792
PROPERTY, PLANT AND EQUIPMENT, net	251,606	248,973
GOODWILL	288,147	288,146
INTANGIBLE ASSETS, net	159,278	160,349
INTERCOMPANY RECEIVABLE	883,208	911,632
EQUITY INVESTMENTS IN SUBSIDIARIES	545,847	533,742
OTHER ASSETS	50,896	50,423
ASSETS OF DISCONTINUED OPERATIONS	0	0
Total Assets	2,737,460	2,737,057
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	1,090	1,079
Accounts payable and accrued liabilities	169,672	182,765
Liabilities of discontinued operations	0	0
Total Current Liabilities	170,762	183,844
LONG-TERM DEBT, net of debt discounts	8,578	9,006
INTERCOMPANY PAYABLES	811,177	796,741
OTHER LIABILITIES	152,629	153,970
LIABILITIES OF DISCONTINUED OPERATIONS	0	0
Total Liabilities	1,143,146	1,143,561
SHAREHOLDERS’ EQUITY	1,594,314	1,593,496
Total Liabilities and Shareholders’ Equity	2,737,460	2,737,057
Non-Guarantor Subsidiaries [Member]
CURRENT ASSETS
Cash and equivalents	40,995	83,793	42,698	49,779
Accounts receivable, net of allowances	75,489	76,241
Contract costs and recognized income not yet billed, net of progress payments	343	145
Inventories, net	61,327	56,723
Prepaid and other current assets	19,635	17,330
Assets of discontinued operations	1,212	1,214
Total Current Assets	199,001	235,446
PROPERTY, PLANT AND EQUIPMENT, net	102,496	103,648
GOODWILL	80,390	69,584
INTANGIBLE ASSETS, net	66,801	61,042
INTERCOMPANY RECEIVABLE	624,044	573,269
EQUITY INVESTMENTS IN SUBSIDIARIES	2,720,505	2,718,956
OTHER ASSETS	7,630	7,423
ASSETS OF DISCONTINUED OPERATIONS	3,061	3,075
Total Assets	3,803,928	3,772,443
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	15,455	8,689
Accounts payable and accrued liabilities	70,051	70,427
Liabilities of discontinued operations	3,142	3,288
Total Current Liabilities	88,648	82,404
LONG-TERM DEBT, net of debt discounts	28,212	12,629
INTERCOMPANY PAYABLES	1,184,325	1,188,017
OTHER LIABILITIES	25,534	25,578
LIABILITIES OF DISCONTINUED OPERATIONS	4,577	4,744
Total Liabilities	1,331,296	1,313,372
SHAREHOLDERS’ EQUITY	2,472,632	2,459,071
Total Liabilities and Shareholders’ Equity	3,803,928	3,772,443
Consolidation, Eliminations [Member]
CURRENT ASSETS
Cash and equivalents	0	0	0	0
Accounts receivable, net of allowances	(28,715)	(33,532)
Contract costs and recognized income not yet billed, net of progress payments	0	0
Inventories, net	(23)	(9)
Prepaid and other current assets	10,561	10,431
Assets of discontinued operations	0	0
Total Current Assets	(18,177)	(23,110)
PROPERTY, PLANT AND EQUIPMENT, net	0	0
GOODWILL	0
INTANGIBLE ASSETS, net	0	0
INTERCOMPANY RECEIVABLE	(2,044,320)	(2,032,804)
EQUITY INVESTMENTS IN SUBSIDIARIES	(5,497,050)	(5,470,562)
OTHER ASSETS	(75,234)	(75,234)
ASSETS OF DISCONTINUED OPERATIONS	0	0
Total Assets	(7,634,781)	(7,601,710)
CURRENT LIABILITIES
Notes payable and current portion of long-term debt	0	0
Accounts payable and accrued liabilities	(19,011)	(23,960)
Liabilities of discontinued operations	0	0
Total Current Liabilities	(19,011)	(23,960)
LONG-TERM DEBT, net of debt discounts	0	0
INTERCOMPANY PAYABLES	(2,016,699)	(2,005,365)
OTHER LIABILITIES	(74,335)	(74,328)
LIABILITIES OF DISCONTINUED OPERATIONS	0	0
Total Liabilities	(2,110,045)	(2,103,653)
SHAREHOLDERS’ EQUITY	(5,524,736)	(5,498,057)
Total Liabilities and Shareholders’ Equity	$ (7,634,781)	$ (7,601,710)