Annual report pursuant to Section 13 and 15(d)

Debt - 2014 Credit Facility (Details)

v3.3.1.900
Debt - 2014 Credit Facility (Details)
6 Months Ended 9 Months Ended
Jun. 30, 2014
USD ($)
Sep. 30, 2014
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Line of Credit Facility [Line Items]        
Additional borrowing capacity   $ 150,000,000.0    
Interest coverage ratio   3.00    
Consolidated net coverage ratio following permitted acquisition   3.50    
Revolving line of credit facility borrowed     $ 40,000,000 $ 20,000,000
Weighted-average interest rate     1.58% 2.13%
Revolving line of credit facility, available borrowing capacity     $ 160,000,000  
Issuance of letters of credit outstanding, amount     10,000,000  
Unamortized debt issuance costs     $ 1,000,000 $ 1,300,000
Permitted Acquisition        
Line of Credit Facility [Line Items]        
Consolidated net coverage ratio following permitted acquisition   3.75    
Federal Funds Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 0.50%      
Prime Rate | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 0.00%      
Prime Rate | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate 0.25%      
Revolving Credit Facility        
Line of Credit Facility [Line Items]        
Aggregate principal amount $ 150,000,000.0 $ 200,000,000    
Consolidated net coverage ratio following permitted acquisition   3.25    
Revolving Credit Facility | LIBOR | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   1.25%    
Revolving Credit Facility | LIBOR | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   1.75%    
Revolving Credit Facility | Base Rate | Minimum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   0.25%    
Revolving Credit Facility | Base Rate | Maximum        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   0.75%    
Revolving Credit Facility | Federal Funds Rate        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   0.50%    
Revolving Credit Facility | One-Month LIBOR        
Line of Credit Facility [Line Items]        
Basis spread on variable rate   1.00%    
Standby Letters of Credit        
Line of Credit Facility [Line Items]        
Sub limit for issuance of letters of credit $ 10,000,000 $ 10,000,000.0    
Swingline Loan        
Line of Credit Facility [Line Items]        
Sub limit for issuance of letters of credit   $ 20,000,000.0