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Debt Narrative (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Dec. 31, 2015
Jun. 24, 2014
Borrowings under Term Loan $ 197,625   $ 216,750 $ 255,000
Line of credit facility, maximum borrowing capacity 200,000     200,000
Line of credit facility, outstanding borrowings       $ 0
Line of credit facility, current borrowing capacity 200,000      
Term loan quarterly payments, next twelve months     25,500  
Term loan quarterly payments, year two     25,500  
Term loan quarterly payments, year three     55,800  
Term loan quarterly payments, year four     $ 110,000  
Repayments on borrowings $ 19,125 $ 19,125    
Loans Payable [Member]        
Term loan spread 1.125%      
Line of Credit [Member]        
Line of credit facility, facility fee 0.125%      
Line of credit facility spread 1.00%