Aggregate realized and unrealized loss on foreign currency transactions included in net income. Includes loss on a foreign currency forward exchange contract. Does not include foreign currency transactions designated as hedges of net investment in a foreign entity or intercompany foreign currency transactions that are of a long-term nature. Gross of tax effect.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30690-110894

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 52

-Paragraph 15, 20, 30

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6450189&loc=d3e30700-110894

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 830

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895

Name:	us-gaap_ForeignCurrencyTransactionLossBeforeTax
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Basis of Presentation and Accounting Policies (Details)	3 Months Ended		9 Months Ended		12 Months Ended		9 Months Ended
Basis of Presentation and Accounting Policies (Details)	Sep. 30, 2011 USD ($)	Sep. 30, 2010	Sep. 30, 2011 USD ($)	Sep. 30, 2010	Dec. 31, 2011 USD ($)	Jan. 11, 2010 VEF	Sep. 30, 2011 Venezuela [Member] USD ($)	Sep. 30, 2010 Venezuela [Member] USD ($)
Percentage of subsidiaries sales and total assets to consolidated sales and assets							1.00%	1.00%
Recognized loss due to currency devaluation								$ 8,400,000
Impairment of assets							0
Basis of Presentation and Accounting Policies (Textual) [Abstract]
Unfavorable impact on operating income	3,900,000		9,000,000
Estimated unfavorable impact on bookings on shipments					25,000,000
Previous exchange rate						2.15
Current exchange rate for non essential items						4.30
Current exchange rate for essential items						2.60
Period of delivery of products and services			one to two-year period
Percentage of completion revenue			700.00%	900.00%
Period of extension of contract			5 years
Maximum percentage of revenue on fixed fee services	1.00%	1.00%	1.00%	1.00%