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Debt (Details Textual) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  | 6 Months Ended |  |  | 6 Months Ended |
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Mar. 31, 2012 | Jun. 30, 2012 | Jun. 30, 2011 | Dec. 31, 2011 | Jun. 30, 2012 Term Loan [Member] | Feb. 22, 2012 Term Loan [Member] | Jun. 30, 2012 Minimum [Member] Term Loan [Member] | Jun. 30, 2012 Maximum [Member] Term Loan [Member] | Jun. 30, 2012 Base rate borrowings [Member] Minimum [Member] Term Loan [Member] | Jun. 30, 2012 Base rate borrowings [Member] Maximum [Member] Term Loan [Member] | Jun. 30, 2012 LIBOR borrowings [Member] Minimum [Member] Term Loan [Member] | Jun. 30, 2012 LIBOR borrowings [Member] Maximum [Member] Term Loan [Member] | Jun. 30, 2012 13-24 [Member] Term Loan [Member] | Jun. 30, 2012 25-36 [Member] Term Loan [Member] | Jun. 30, 2012 Non-US lines of credit [Member] | Jun. 30, 2012 ABL Facility [Member] | Feb. 22, 2012 ABL Facility [Member] | Jun. 30, 2012 ABL Facility [Member] Term Loan [Member] | Jun. 30, 2012 ABL Facility [Member] Letters of credit [Member] | Jun. 30, 2012 ABL Facility [Member] Base rate borrowings [Member] Minimum [Member] | Jun. 30, 2012 ABL Facility [Member] Base rate borrowings [Member] Maximum [Member] | Jun. 30, 2012 ABL Facility [Member] LIBOR borrowings [Member] Minimum [Member] | Jun. 30, 2012 ABL Facility [Member] LIBOR borrowings [Member] Maximum [Member] | Jun. 30, 2012 ABL Facility [Member] Non-US lines of credit [Member] Term Loan [Member] | Jun. 30, 2012 ABL Facility [Member] Capital lease obligations [Member] Term Loan [Member] | Jun. 30, 2012 Secured revolving credit facility [Member] | Jun. 30, 2012 Note purchase agreement [Member] | Jun. 30, 2012 Master Note Purchase Agreement [Member] | Dec. 31, 2011 Prior Credit Agreement [Member] | Dec. 31, 2011 Prior Credit Agreement [Member] Letters of credit [Member]
Debt (Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Secured credit facility |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 13.9 |  | $ 100.0 |  | $ 50.0 |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, term |  | 5 years |  |  | 5 years |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Additional borrowing capacity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 25 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Base rate borrowings margin ranges |  |  |  |  |  |  |  |  | 9.00% | 10.00% | 10.00% | 11.00% |  |  |  |  |  |  |  | 1.00% | 2.75% | 1.75% | 3.50% |  |  |  |  |  |  |
Commitment fee |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.50% |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, amount outstanding |  | 18.2 |  |  | 10.8 | 215.0 |  |  |  |  |  |  |  |  | 3.9 |  |  |  |  |  |  |  |  |  |  | 240.0 |  |  | 180.0 |
Maturing date of Term loan |  |  |  |  | Feb. 22, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 25, 2012 |  |  |  |
Date of commencement of installation |  |  |  |  | Mar. 31, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment premium, description |  |  |  |  | first 12 months |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepayment premium, interest rate |  |  |  |  |  |  |  |  |  |  |  |  | 2.75% | 2.00% |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fixed Charge Ratio |  |  |  |  |  |  | 1.00 | 1.50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Leverage Ratio |  |  |  |  |  |  | 1.00 | 2.00 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Line of credit facility, initiation date |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | Apr. 25, 2007 | Jun. 01, 2009 | Jun. 01, 2003 |  |
Remaining borrowing capacity |  | 32.8 |  |  |  |  |  |  |  |  |  |  |  |  |  | 28.7 |  |  |  |  |  |  |  |  |  |  |  |  | 49.1 | 32.5
Current borrowing capacity |  | 79.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maturities payment, 2012 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.0 |  |  |  |  |  | 3.9 | 0.1 |  |  |  |  |
Maturities payment, 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 21.7 |  |  |  |  |  |  |  |  |  |  |  |
Maturities payment, 2014 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32.3 |  |  |  |  |  |  |  |  |  |  |  |
Maturities payment, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32.3 |  |  |  |  |  |  |  |  |  |  |  |
Maturities payment, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 32.3 |  |  |  |  |  |  |  |  |  |  |  |
Maturities payment, thereafter |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 114.1 |  |  |  |  |  |  |  |  |  |  |  |
Debt (Additional Textual) [Abstract] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Breakage fees and premiums |  | 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of aggregate borrowings |  | 236.7 |  | 221.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt agreement termination costs | 1.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt agreement termination costs, whole interest | 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write-off financing cost |  | 0.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Debt issuance costs |  | 8.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred financing fees totaled |  | 7.3 |  | 1.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Payments of debt issuance costs |  | $ 6.2 | $ 2.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 47 -Paragraph 10 -Subparagraph b -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. + Details
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- Definition The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3291-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 95-13 -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. + Details
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