Long-Term Obligations (Details 1)	9 Months Ended
	Sep. 30, 2011
Level One [Member]
Summary of Leverage ratios in effect from time to time
Leverage Ratio	Greater than or equal to 2.50:1.00
Applicable Margin for Eurodollar Rate Loans	2.25%
Applicable Revolving Commitment Fee %	0.50%
Level Two [Member]
Summary of Leverage ratios in effect from time to time
Leverage Ratio	Less than 2.50:1.00 and Greater than or equal to 1.75:1.00
Applicable Margin for Eurodollar Rate Loans	1.75%
Applicable Revolving Commitment Fee %	0.375%
Level Three [Member]
Summary of Leverage ratios in effect from time to time
Leverage Ratio	Less than 1.75:1.00 and greater than or equal to 1.00:1.00
Applicable Margin for Eurodollar Rate Loans	1.50%
Applicable Revolving Commitment Fee %	0.25%
Level Four [Member]
Summary of Leverage ratios in effect from time to time
Leverage Ratio	Less than 1.00:1.00
Applicable Margin for Eurodollar Rate Loans	1.25%
Applicable Revolving Commitment Fee %	0.20%