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Note 14 - Commitments and Contingent Liabilities (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Letters of Credit Outstanding, Amount	$ 39.6	$ 38.9
Purchase Commitment, Remaining Minimum Amount Committed	74.3	55.0
Software [Member]
Purchase Commitment, Remaining Minimum Amount Committed	0.4
Transport Enterprise Leasing, LLC [Member]
Purchase Commitment, Remaining Minimum Amount Committed	$ 0.5

The floor amount as of the balance sheet date that the entity must expend to satisfy the terms of disclosed arrangements (excluding long-term commitments) in which the entity has agreed to expend funds to procure goods or services from one or more suppliers, other than under a long-term purchase commitment or an unconditional purchase obligation.

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