Derivative Financial Instruments - Summary of Interest Rate Swap Agreements (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Interest Rate Swap [Member]
Derivative [Line Items]
Notional amount	$ 125
Effective Date	Sep. 01, 2011
Expiration Date	Aug. 01, 2018
Fixed Rate Paid	2.37%
Floating Rate Received	1 month LIBOR
Interest Rate Swap One [Member]
Derivative [Line Items]
Notional amount	100
Effective Date	Dec. 30, 2011
Expiration Date	Dec. 29, 2017
Fixed Rate Paid	1.6125%
Floating Rate Received	1 month LIBOR
Interest Rate Swap Two [Member]
Derivative [Line Items]
Notional amount	100
Effective Date	Sep. 04, 2013
Expiration Date	Sep. 04, 2018
Fixed Rate Paid	1.371%
Floating Rate Received	1 month LIBOR
Interest Rate Swap Three [Member]
Derivative [Line Items]
Notional amount	100
Effective Date	Dec. 29, 2017
Expiration Date	Nov. 29, 2019
Fixed Rate Paid	3.968%
Floating Rate Received	1 month LIBOR
Interest Rate Swap Four [Member]
Derivative [Line Items]
Notional amount	$ 125
Effective Date	Aug. 01, 2018
Expiration Date	Jun. 01, 2020
Fixed Rate Paid	4.193%
Floating Rate Received	1 month LIBOR