Annual report pursuant to Section 13 and 15(d)

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

v3.6.0.2
Fair Value Measurements - Fair Value and Carrying Value of Fixed Rate Long-Term Debt (Detail) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Carrying Value $ 882,678 $ 814,582
7.0% Senior Subordinated Notes Due 2022 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 211,000 211,000
Long-term Debt, Carrying Value 198,871 198,708
5.0% Senior Subordinated Notes due 2023 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 284,934 284,250
Long-term Debt, Carrying Value 289,273 300,000
Mortgage Loan at Fix Interest Rate [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 185,979 174,007
Long-term Debt, Carrying Value 176,369 168,410
Other [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Long-term Debt, Fair Value 4,057 5,192
Long-term Debt, Carrying Value $ 4,280 $ 5,457