CORRECTION OF PRIOR PERIOD ERROR (Balance Sheet) (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2010
Receivables, net	$ 531,541	$ 543,009
Inventories, net	355,383	313,045
Other current assets	49,660	45,955
Total current assets	1,226,097	1,150,671
Property, plant, and equipment, net	438,597	442,728
Total assets	2,705,705	2,635,547
Deferred revenue	199,254	206,061
Other current liabilities	36,066	43,841
Total current liabilities	615,098	512,042
Total Liabilities	1,390,935	1,430,456
Retained earnings	1,227,191	1,164,041	1,053,000
Total Stockholders' Equity	1,314,770	1,205,091
Total Liabilities and Stockholders' Equity	2,705,705	2,635,547
ScenarioPreviouslyReportedMember
Receivables, net		556,026
Inventories, net		320,633
Other current assets		41,813
Total current assets		1,167,134
Property, plant, and equipment, net		443,555
Total assets		2,652,837
Deferred revenue		200,268
Other current liabilities		42,976
Total current liabilities		505,384
Total Liabilities		1,423,798
Retained earnings		1,187,989	1,072,000
Total Stockholders' Equity		1,229,039
Total Liabilities and Stockholders' Equity		2,652,837
RestatementAdjustmentMember
Receivables, net		(13,017)
Inventories, net		(7,588)
Other current assets		4,142
Total current assets		(16,463)
Property, plant, and equipment, net		(827)
Total assets		(17,290)
Deferred revenue		5,793
Other current liabilities		865
Total current liabilities		6,658
Total Liabilities		6,658
Retained earnings		(23,948)	19,000
Total Stockholders' Equity		(23,948)
Total Liabilities and Stockholders' Equity		$ (17,290)