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Total Debt - Additional Information (Details)
12 Months Ended
Feb. 17, 2016
USD ($)
Dec. 16, 2015
USD ($)
Dec. 16, 2013
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 01, 2014
USD ($)
Debt Instrument [Line Items]            
Debt weighted average interest rate       2.70% 1.70%  
Notes payable       $ 594,700,000 $ 593,700,000  
Debt interest rate   5.375% 5.375%      
Proceeds from Issuance of Unsecured Debt   $ 299,000,000 $ 295,000,000      
Secured Debt            
Debt Instrument [Line Items]            
Term loan facility $ 188,700,000         $ 200,000,000
Annual paydown requirements year one 5.00%          
Annual paydown requirements year two 7.50%          
Annual paydown requirements year three 10.00%          
Annual paydown requirements year four 12.50%          
Annual paydown requirements year five 15.00%          
Revolving Credit Facility | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Variable rate basis       LIBOR    
Remaining borrowing capacity       $ 344,700,000    
Unsecured Debt            
Debt Instrument [Line Items]            
Notes payable   $ 300,000,000 300,000,000      
Premium Percent for Debt Issuance   101.00%        
Debt issuance costs   $ 4,700,000 $ 6,300,000      
Quarterly Principal Payments | Secured Debt            
Debt Instrument [Line Items]            
Long-term line of credit, noncurrent $ 2,400,000          
Incremental Quarterly Principal Payments | Secured Debt            
Debt Instrument [Line Items]            
Long-term line of credit, noncurrent 1,200,000          
Maximum Quarterly Principal Payments | Secured Debt            
Debt Instrument [Line Items]            
Long-term line of credit, noncurrent 7,100,000          
Final Balance Due | Secured Debt            
Debt Instrument [Line Items]            
Long-term line of credit, noncurrent $ 94,400,000          
Minimum | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Margin on variable rate 1.125%          
Commitment fee, unused capacity 0.15%          
Debt covenant, interest coverage ratio 3.0          
Debt covenant, leverage ratio 4.5          
Maximum | Revolving Credit Facility | London Interbank Offered Rate (LIBOR)            
Debt Instrument [Line Items]            
Margin on variable rate 2.50%          
Commitment fee, unused capacity 0.35%          
Debt covenant, leverage ratio 5.0          
Line of Credit Facility, Covenant Terms, Senior Secured Leverage Ratio 3.5          
Senior Secured Credit Facility due 2021 | Secured Debt            
Debt Instrument [Line Items]            
Maximum aggregate commitment for Senior Secured Credit Facility $ 500,000,000          
Term Loan due 2021 | Secured Debt            
Debt Instrument [Line Items]            
Unamortized term loan $ 188,700,000          
5.375% Senior Unsecured Notes due 2021 | Unsecured Debt            
Debt Instrument [Line Items]            
Notes payable   $ 600,000,000        
Debt interest rate       5.375% 5.375%  
Percent of principal amount of notes redeemed prior to make-whole premium       100.00%    
Percentage of principal amount redeemed       104.00%