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Bank Debt (Details) (USD $)
In Millions, unless otherwise specified
 1 Months Ended 6 Months Ended 6 Months Ended
Oct. 31, 2012
Jun. 30, 2014
Jun. 30, 2014
Revolving Credit Facility [Member]
Oct. 01, 2012
Revolving Credit Facility [Member]
Jun. 30, 2014
Revolving Credit Facility [Member]
Minimum [Member]
Jun. 30, 2014
Revolving Credit Facility [Member]
London Interbank Offered Rate (LIBOR) [Member]
Jun. 30, 2014
Leverage Ratio Less Than 1.5 [Member]
Revolving Credit Facility [Member]
London Interbank Offered Rate (LIBOR) [Member]
Jun. 30, 2014
Leverage Ratio Between 1.5 and 2 [Member]
Revolving Credit Facility [Member]
London Interbank Offered Rate (LIBOR) [Member]
Jun. 30, 2014
Leverage Ratio Above 2 [Member]
Revolving Credit Facility [Member]
London Interbank Offered Rate (LIBOR) [Member]
Closing costs of debt $ 1.5                
Loan initiation amortization period   5 years              
Credit agreement, amount outstanding   16.0              
Credit facility, maximum borrowing capacity       165          
Debt term     5 years            
Debt, interest rate spread on variable rate             2.00% 2.50% 3.00%
Maximum leverage ratio           275.00%      
Credit facility, commitment fee percentage     0.50%   0.375%        
Credit facility, threshold for lower BPS     33.00%            
Credit facility, remaining borrowing capacity     $ 102