Litigation, Claims, Contingencies and Other - Additional Information (Detail) (USD $)	9 Months Ended
	Sep. 30, 2013	Aug. 31, 2013
Commitments And Contingencies Disclosure [Abstract]
Environmental remediation liability	$ 5,100,000
Environment remediation liability included in other current liabilities	398,000
Environment remediation liability included in other deferred items and liabilities	4,723,000
Maximum potential amount of future payments	15,500,000
Guarantees relate to leased facilities expiry date	October 2017
Recourse provision to recover guarantees	0
Concession contract expiration date		Dec. 31, 2013
Possessory interest		25,000,000
Estimated amount for personal property		$ 5,000,000
Revenue through concession contract		49.00%
Operating lease term	42 years
Ground lease end date	Jan. 31, 2052
Segment operating income	24.00%