Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Detail)

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Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Detail) - USD ($)
$ in Thousands
Sep. 30, 2015
Dec. 31, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Carrying Value $ 827,582 $ 773,412
7.0% Senior Subordinated Notes Due 2022 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 211,500 216,000
Long-term Debt, Carrying Value 198,669 198,556
5.0% Senior Subordinated Notes due 2023 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 290,250 294,000
Long-term Debt, Carrying Value 300,000 300,000
Mortgage Loan at Fix Interest Rate [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 177,363 152,240
Long-term Debt, Carrying Value 170,621 147,554
Assumed Notes [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 1,687 4,365
Long-term Debt, Carrying Value 1,696 4,474
Other [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 4,425 4,588
Long-term Debt, Carrying Value $ 4,705 $ 4,884