Long-Term Obligations (Details 2)	6 Months Ended
	Jun. 30, 2015
Tier One [Member] | Minimum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	4
Tier Two [Member] | Minimum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	3.25
Tier Two [Member] | Maximum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	4
Tier Three [Member] | Minimum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	2.50
Tier Three [Member] | Maximum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	3.25
Tier Four [Member] | Minimum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	1.75
Tier Four [Member] | Maximum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	2.5
Tier Five [Member] | Minimum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	1.00
Tier Five [Member] | Maximum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	1.75
Tier Six [Member] | Maximum [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Consolidated Leverage Ratio	1.00
Senior Notes [Member] | Federal funds rate [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Basis spread on variable rate	0.50%
Senior Notes [Member] | Eurodollar [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Basis spread on variable rate	1.00%
Credit Agreement [Member] | Tier One [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.45%
Credit Agreement [Member] | Tier Two [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.40%
Credit Agreement [Member] | Tier Three [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.35%
Credit Agreement [Member] | Tier Four [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.30%
Credit Agreement [Member] | Tier Five [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.25%
Credit Agreement [Member] | Tier Six [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Commitment Fee (percentage)	0.25%
Credit Agreement [Member] | Eurodollar [Member] | Tier One [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	2.25%
Credit Agreement [Member] | Eurodollar [Member] | Tier Two [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	2.00%
Credit Agreement [Member] | Eurodollar [Member] | Tier Three [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.75%
Credit Agreement [Member] | Eurodollar [Member] | Tier Four [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.50%
Credit Agreement [Member] | Eurodollar [Member] | Tier Five [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.25%
Credit Agreement [Member] | Eurodollar [Member] | Tier Six [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.00%
Credit Agreement [Member] | Base Rate [Member] | Tier One [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.25%
Credit Agreement [Member] | Base Rate [Member] | Tier Two [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	1.00%
Credit Agreement [Member] | Base Rate [Member] | Tier Three [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	0.75%
Credit Agreement [Member] | Base Rate [Member] | Tier Four [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	0.50%
Credit Agreement [Member] | Base Rate [Member] | Tier Five [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	0.25%
Credit Agreement [Member] | Base Rate [Member] | Tier Six [Member]
Schedule of Percentage Margin for Eurodollar Rate Loans and Commitment Fee [Line Items]
Applicable margin for borrowings (percentage)	0.00%