Fair Value Measurements - Schedule of Fair Value of Financial Liabilities (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]    
Long term debt, As reflected on the balance sheet $ 1,235,088 $ 1,249,218
Fair value, Long term debt 1,162,316 1,165,119
Level 1 [Member]
   
Debt Instrument [Line Items]    
Fair value, Long term debt      
Level 2 [Member]
   
Debt Instrument [Line Items]    
Fair value, Long term debt 1,162,316 1,165,119
Level 3 [Member]
   
Debt Instrument [Line Items]    
Fair value, Long term debt