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Long-Term Debt (Tables)
 3 Months Ended
Mar. 31, 2016
Debt Instrument [Line Items]  
Summary of long-term debt
The Company carries its long-term debt at face value, net of applicable discounts and capitalized debt issuance costs. Long-term debt consisted of the following:
 
 
March 31, 2016
 
December 31, 2015
 
 
(dollars in thousands)
5.00% Senior Notes (aggregate principal of $550,000 at March 31, 2016 and December 31, 2015)
 
$
539,309

 
$
538,933

5.25% Senior Notes (aggregate principal of $300,000 at March 31, 2016 and December 31, 2015)
 
295,186

 
295,156

Real Estate Related and Other Long-Term Debt
 
398,509

 
365,564

Capital lease obligations related to real estate, maturing in varying amounts through June 2034 with a weighted average interest rate of 9.7% and 9.8%, respectively
 
50,883

 
51,902

 
 
1,283,887

 
1,251,555

Less current maturities of other long-term debt
 
27,208

 
52,021

 
 
$
1,256,679

 
$
1,199,534