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Liquidity (Tables)
12 Months Ended
Dec. 31, 2012
Liquidity [Abstract]  
Schedule of Debt Covenants [Table Text Block]
On April 27, 2012, we entered into an amendment to our amended and restated credit agreement, which reset the minimum Consolidated EBITDA, maximum Total Leverage Ratio and minimum Interest Coverage Ratio covenants (as defined in the amended and restated credit agreement).

The covenants for each of the remaining test periods are as follows:

 
Four Consecutive Fiscal Quarters Ending
Minimum Consolidated
EBITDA
 
Maximum Total
Leverage Ratio
 
Minimum Interest
Coverage Ratio
December 31, 2012
$170,000,000
 
8.6 to 1.00
 
1.05 to 1.00
March 31, 2013
$200,000,000
 
7.4 to 1.00
 
1.20 to 1.00
June 30, 2013
$235,000,000
 
6.5 to 1.00
 
1.45 to 1.00
September 30, 2013
$260,000,000
 
6.0 to 1.00
 
1.60 to 1.00
December 31, 2013
$275,000,000
 
5.7 to 1.00
 
1.65 to 1.00
March 31, 2014
$300,000,000
 
5.1 to 1.00
 
1.80 to 1.00
June 30, 2014
$325,000,000
 
4.8 to 1.00
 
1.90 to 1.00
September 30, 2014
$355,000,000
 
4.6 to 1.00
 
2.10 to 1.00
December 31, 2014
$365,000,000
 
4.4 to 1.00
 
2.15 to 1.00