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Amount before accumulated depreciation of leased physical assets used in the normal conduct of business to produce goods and services.

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Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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The total gross amount less the charge for the use of the long-lived depreciable assets subject to a lease meeting the criteria for capitalization.

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Weighted average interest rate of debt outstanding.

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No definition available.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt, after unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of a type of municipal bond typically used to fund a development project. Also called special assessment limited liability bond, special district bond, special purpose bond, special tax bond and community development obligation. Interest owed to lenders is paid by taxes levied on the community benefiting from the particular bond-funded project. For example, if a bond of this sort was issued to pay for sidewalks to be repaved in a certain community, an additional tax would be levied on homeowners in the area benefiting from this project.

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Long-Term Debt (Details) (USD $)	12 Months Ended
Long-Term Debt (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Long-term Debt Types [Abstract]
Captial lease arrangments	$ 12,100,000us-gaap_CapitalLeaseObligations	$ 5,500,000us-gaap_CapitalLeaseObligations	$ 18,100,000us-gaap_CapitalLeaseObligations
Total Long-Term Debt	407,400,000us-gaap_LongTermDebt	355,100,000us-gaap_LongTermDebt
Long Term Debt By Current And Noncurrent [Abstract]
Current maturities of long-term debt	34,100,000us-gaap_LongTermDebtCurrent	24,600,000us-gaap_LongTermDebtCurrent
Long-term debt	373,300,000us-gaap_LongTermDebtNoncurrent	330,500,000us-gaap_LongTermDebtNoncurrent
Total Long-Term Debt	407,400,000us-gaap_LongTermDebt	355,100,000us-gaap_LongTermDebt
Minimum Repayments of Long-term Debt [Line Items]
2015	34,100
2016	26,200
2017	250,300
2018	14,200
2019	11,600
Later years	71,000
Borrowed Funds	407,400us-gaap_DebtAndCapitalLeaseObligations
Captial Leases [Line Items]
Capital Leased Assets Gross	141,300us-gaap_CapitalLeasedAssetsGross	138,100us-gaap_CapitalLeasedAssetsGross
Accumulated Amortization	(71,200)	(57,600)
Total	70,100	80,500
Buildings [Member]
Captial Leases [Line Items]
Capital Leased Assets Gross	2,300	2,600
Vehicles [Member]
Captial Leases [Line Items]
Capital Leased Assets Gross	107,500	103,700
Machinery and Equipment [Member]
Captial Leases [Line Items]
Capital Leased Assets Gross	31,500	31,800
Capital Leases Member
Minimum Repayments of Long-term Debt [Line Items]
2015	21,300
2016	17,300
2017	9,700
2018	7,100
2019	4,500
Later years	5,000
Borrowed Funds	64,900
Other Long-term Debt Member
Minimum Repayments of Long-term Debt [Line Items]
2015	12,800
2016	8,900
2017	240,600
2018	7,100
2019	7,100
Later years	66,000
Borrowed Funds	342,500
Revolving Facility [Member]
Long-term Debt Types [Abstract]
Bank Credit Facility	233,000,000	120,600,000
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	1.60%	1.60%
Private Placement [Member]
Long-term Debt Types [Abstract]
Bank Credit Facility	100,000,000	100,000,000
Interest Rate And Other Disclosures [Abstract]
Debt Due Date	Jan. 01, 2021
Private Placement [Member] \| Private Placement Notes Seriesa [Member]
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	4.60%
Private Placement [Member] \| Private Placement Notes Series B [Member]
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	5.20%
Other Non-US Dollar-denominated Facilities [Member]
Long-term Debt Types [Abstract]
Bank Credit Facility	9,500,000	14,900,000
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	6.90%	5.70%
Dominion Terminal Associates Bonds [Member]
Long-term Debt Types [Abstract]
Dominion Terminal Associates Bonds	0	43,200,000
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	6.00%
Debt Due Date	Jan. 01, 2033
Captial Lease Interest Rate Information [Member]
Long-term Debt Types [Abstract]
Captial lease arrangments	$ 64,900,000	$ 76,400,000
Interest Rate And Other Disclosures [Abstract]
Average Interest Rate	3.50%	3.70%