Subsequent Events - Additional Information (Detail) (USD $) In Billions, unless otherwise specified	12 Months Ended	1 Months Ended
	Dec. 31, 2011 Passenger	Feb. 29, 2012 New Contract Ocean Dream	Feb. 29, 2012 Capital expenditure, contracted Project Sunshine Passenger
Subsequent Event [Line Items]
Charter term		6 years
Additional charter term after renewal of agreement		4 years
Anticipate ship delivery date (month and year)		2012-04
Aggregate additional capacity	7,100		4,100
Expected service start period			Second quarter of 2015
Aggregate cost of ships expected to enter service	$ 2.0		$ 2.8