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Commitments and Contingencies (Narrative) (Details) (USD $)
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12 Months Ended | ||
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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| Commitments and Contingencies [Abstract] | |||
| Rental costs | $ 37,400,000 | $ 36,300,000 | $ 31,000,000 |
| Deferred Revenue, Operating Leases | 47,800,000 | 45,800,000 | |
| Cost of assets leased to customers | 259,800,000 | 258,600,000 | |
| Carrying value of assets leased to customers | 143,600,000 | 153,100,000 | |
| Healthcare Self Insurance Coverage Limit Per Incident | 500,000 | ||
| Healthcare Self Insurance Coverage Limit Per Year | 2,000,000 | ||
| Workers Compensation Self Insurance Coverage Limit Per Incident | 500,000 | ||
| Healthcare Self Insurance Reserve | 2,700,000 | 1,600,000 | |
| Workers Compensation Self Insurance Reserve | 2,400,000 | 1,900,000 | |
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Aircraft Accident Reserve [Member]
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| Commitments Contingencies [Line Items] | |||
| Self Insurance Reserve Current | $ 1,000,000 | $ 1,100,000 | |
| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
health and welfare claims per year No definition available.
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| X | ||||||||||
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- Definition
health and welfare claims limit per year No definition available.
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| X | ||||||||||
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- Definition
Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, arising from healthcare related claims. No definition available.
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| X | ||||||||||
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- Definition
health and welfare claims per accident No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
This element represents revenue received, but not recognized for financial reporting purposes. Such deferred revenue may consist of and include amounts paid in advance by lessees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The gross amount of lessor property subject to or available for lease as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The amount of property, by major property class, net of accumulated depreciation, subject to or available for lease as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Carrying amount of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property that are expected to be paid within one year (or the normal operating cycle, if longer). No definition available.
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