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Senior Credit Facilities (Tables)
9 Months Ended
Sep. 30, 2012
Senior Credit Facilities (Tables) [Abstract]  
Financial Covenants Ratios
 
Required Ratio
 
Actual Ratio
Maximum consolidated leverage ratio
No greater than
 
3.25:1
 
1.31:1
Minimum fixed charge coverage ratio
No less than
 
1.35:1
 
1.66:1