v2.4.0.8
Derivatives - Schedule of Outstanding and Matured Interest Rate Swaps (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Derivative [Line Items]  
Notional Amount $ 750,000
Maturity Date May 15, 2019
2.03% Interest Rate Swap Outstanding [Member]
 
Derivative [Line Items]  
Notional Amount 400,000
Interest Rate Received 1 month LIBOR
Interest Rate Paid 2.03%
Effective Date Jul. 29, 2011
Maturity Date Sep. 30, 2014
2.51% Interest Rate Swap Outstanding [Member]
 
Derivative [Line Items]  
Notional Amount $ 350,000
Interest Rate Received 1 month LIBOR
Interest Rate Paid 2.51%
Effective Date Apr. 30, 2012
Maturity Date Sep. 30, 2014