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Credit Facilities
6 Months Ended
Jun. 30, 2011
Credit Facilities  
Credit Facilities
(2)   Credit Facilities

As of June 30, 2011, we have committed credit facilities with two banks totaling $225.0 million that mature in May 2012 ($50.0 million) and November 2013 ($175.0 million). Borrowings under these credit facilities bear variable interest based on the London Interbank Offered Rate ("LIBOR"). As of June 30, 2011, we had no borrowings outstanding under these credit facilities with banks. The $225.0 million of credit available under these facilities is reduced by $40.1 million in stand-by letters of credit under which we are obligated. Each of the debt agreements includes, among other things, two financial covenants requiring us (i) not to exceed a maximum ratio of total debt to total capitalization and (ii) not to exceed a maximum ratio of total funded debt to earnings before interest, income taxes, depreciation and amortization (as such terms are defined in each credit facility). At June 30, 2011, we were in compliance with these covenants.