FINANCING ARRANGEMENTS	6 Months Ended
FINANCING ARRANGEMENTS	Jun. 30, 2013
Debt Disclosure [Abstract]
FINANCING ARRANGEMENTS	FINANCING ARRANGEMENTS On October 29, 2012, we entered into a senior unsecured revolving credit facility for up to $500 million with a $500 million accordion feature (the "Credit Agreement"), with a syndicate of financial institutions led by U. S. Bank. The purpose of this facility was to partially fund the acquisition of Phoenix International Freight Services, Ltd. ("Phoenix") and will allow us to continue to fund working capital, capital expenditures, dividends, and share repurchases. The Credit Agreement expires on October 29, 2017. As of June 30, 2013, we had $365.0 million in borrowings outstanding under the Credit Agreement which is classified as a current liability on the consolidated balance sheet. We consider these borrowings to be a Level 2 financial liability and therefore, the recorded amount of borrowings outstanding approximates fair value because of the short maturity period of the debt. Borrowings under the Credit Agreement generally bear interest at a variable rate equal to (i) LIBOR plus 1.00%, or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50%, or (c) the sum of 1.00% plus one-month LIBOR plus a specified margin). In addition, there is a commitment fee on the average daily undrawn sated amount under each letter of credit issued under the facility. The weighted average interest rate incurred on borrowings during the quarter ended June 30, 2013 was approximately 1.3% and at June 30, 2013 was approximately 1.2%. The Credit Agreement contains various restrictions and covenants. Among other requirements, we may not permit our leverage ratio, as of the end of each of our fiscal quarters, of (i) Consolidated Funded Indebtedness to (ii) Consolidated Total Capitalization, to be greater than 0.65 to 1.00. We were in compliance with the debt covenants as of June 30, 2013. The Credit Agreement also contains customary events of default. If an event of default under the Credit Agreement occurs and is continuing, then the administrative agent may declare any outstanding obligations under the Credit Agreement to be immediately due and payable. In addition, if we become the subject of voluntary or involuntary proceedings under any bankruptcy, insolvency or similar law, then any outstanding obligations under the Credit Agreement will automatically become immediately due and payable.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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