Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Long-Term Debt (Details)

v3.10.0.1
Long-Term Debt - Long-Term Debt (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Dec. 31, 2017
Mar. 10, 2017
May 09, 2013
Debt Instrument [Line Items]        
Debt issuance costs $ (12,121) $ (13,208)    
Other 3,771 3,947    
Total debt 970,914 1,024,703    
Less current maturities (37,786) (61,314)    
Long-term debt 933,128 963,389    
Mortgage notes        
Debt Instrument [Line Items]        
Mortgage notes to finance companies-fixed rate, bearing interest from 3.51% to 7.03% 229,828 199,972    
Mortgage notes to finance companies-variable rate, bearing interest at 1.50 to 2.90 percentage points above one-month or three-month LIBOR $ 192,767 219,719    
Mortgage notes | Minimum        
Debt Instrument [Line Items]        
Mortgage notes to finance companies-fixed rate, percentage 3.51%      
Mortgage notes to finance companies-variable rate, percentage 1.50%      
Mortgage notes | Maximum        
Debt Instrument [Line Items]        
Mortgage notes to finance companies-fixed rate, percentage 7.03%      
Mortgage notes to finance companies-variable rate, percentage 2.90%      
2016 Revolving Credit Facility        
Debt Instrument [Line Items]        
2016 Revolving Credit Facility $ 17,396 $ 75,000    
Interest rate 2.25% 2.25%    
5.0% Senior Subordinate Notes due 2023        
Debt Instrument [Line Items]        
Senior Subordinated Notes $ 289,273 $ 289,273    
Total debt $ 289,273 289,273    
Stated interest rate on debt agreement 5.00%     5.00%
6.125% Senior Subordinate Notes due 2027        
Debt Instrument [Line Items]        
Senior Subordinated Notes $ 250,000 250,000    
Total debt $ 250,000 $ 250,000    
Stated interest rate on debt agreement 6.125%   6.125%