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Long-term Debt - Senior Secured Credit Facilities (Details) - USD ($)
12 Months Ended
Oct. 15, 2018
Jan. 19, 2017
Oct. 30, 2013
Dec. 31, 2018
Dec. 31, 2017
Aug. 31, 2015
Debt Instrument [Line Items]            
Interest rate       5.625%    
Pinnacle 5.625% senior notes due 2024 | Senior notes            
Debt Instrument [Line Items]            
Interest rate 5.625%          
Secured credit facility | 2013 Revolving Credit Facility            
Debt Instrument [Line Items]            
Debt term     5 years      
Maximum borrowing capacity     $ 500,000,000     $ 633,200,000
Secured credit facility | 2013 Term Loan A Facility            
Debt Instrument [Line Items]            
Debt term     5 years      
Maximum borrowing capacity     $ 500,000,000      
Secured credit facility | 2013 Term Loan A Facility | LIBOR | Minimum            
Debt Instrument [Line Items]            
Spread on variable interest rate     1.25%      
Secured credit facility | 2013 Term Loan A Facility | LIBOR | Maximum            
Debt Instrument [Line Items]            
Spread on variable interest rate     2.75%      
Secured credit facility | 2013 Term Loan B Facility            
Debt Instrument [Line Items]            
Debt term     7 years      
Maximum borrowing capacity     $ 250,000,000     $ 646,700,000
Secured credit facility | 2013 Term Loan B Facility | LIBOR            
Debt Instrument [Line Items]            
Spread on variable interest rate 2.50%   2.50%      
Variable interest rate floor     0.75%      
Secured credit facility | 2013 Term Loan B Facility | Base rate            
Debt Instrument [Line Items]            
Spread on variable interest rate 1.50%          
Secured credit facility | Revolving Credit Facility            
Debt Instrument [Line Items]            
Debt term   5 years        
Maximum borrowing capacity   $ 700,000,000        
Letters of credit outstanding       $ 30,000,000.0 $ 22,100,000  
Available borrowing capacity       $ 558,000,000.0 677,900,000  
Secured credit facility | Term Loan A Facility            
Debt Instrument [Line Items]            
Debt term   5 years        
Maximum borrowing capacity   $ 300,000,000        
Secured credit facility | Term Loan B Facility            
Debt Instrument [Line Items]            
Debt term   7 years        
Maximum borrowing capacity   $ 500,000,000        
Secured credit facility | Term Loan A Facility due 2023, incremental loans            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 430,200,000          
Secured credit facility | Term Loan A Facility due 2023 | LIBOR | Minimum            
Debt Instrument [Line Items]            
Spread on variable interest rate 1.25%          
Secured credit facility | Term Loan A Facility due 2023 | LIBOR | Maximum            
Debt Instrument [Line Items]            
Spread on variable interest rate 3.00%          
Secured credit facility | Term Loan A Facility due 2023 | Base rate | Minimum            
Debt Instrument [Line Items]            
Spread on variable interest rate 0.25%          
Secured credit facility | Term Loan A Facility due 2023 | Base rate | Maximum            
Debt Instrument [Line Items]            
Spread on variable interest rate 2.00%          
Secured credit facility | Term Loan B-1 Facility due 2025            
Debt Instrument [Line Items]            
Maximum borrowing capacity $ 1,128,800,000          
Variable interest rate floor 0.75%          
Secured credit facility | Term Loan B-1 Facility due 2025 | LIBOR            
Debt Instrument [Line Items]            
Spread on variable interest rate 2.25%          
Secured credit facility | Term Loan B-1 Facility due 2025 | Base rate            
Debt Instrument [Line Items]            
Spread on variable interest rate 1.25%          
Secured credit facility | Revolving Credit Facility due 2023 | Minimum            
Debt Instrument [Line Items]            
Unused commitment fee percentage       0.20%    
Secured credit facility | Revolving Credit Facility due 2023 | Maximum            
Debt Instrument [Line Items]            
Unused commitment fee percentage       0.50%    
Secured credit facility | Senior Secured Credit Facility            
Debt Instrument [Line Items]            
Refinancing costs         5,500,000  
Loss on early extinguishment of debt         21,000,000.0  
Secured credit facility | 2013 Senior Secured Credit Facilities            
Debt Instrument [Line Items]            
Refinancing costs         1,700,000  
Loss on early extinguishment of debt         $ 2,300,000