Commitments and Contingencies - Additional Information (Detail)	1 Months Ended		6 Months Ended		1 Months Ended
	Jul. 31, 2002 USD ($)	Jul. 31, 2002 GBP (£)	Jun. 30, 2011 USD ($)	Dec. 31, 2010	Sep. 30, 2010 Lower Limit United States District Court for Puerto Rico USD ($)	Sep. 30, 2010 United States District Court for Puerto Rico USD ($)	Jul. 31, 2002 Lower Limit	Jul. 31, 2002 Upper Limit
Commitments and Contingencies Disclosure [Line Items]
Ship construction commitment option			In addition, we have an option to construct a second ship of the same class which will expire on February 28, 2012, subject to earlier acceleration under certain circumstances.
Common stock ownership description			If any person other than A. Wilhelmsen AS. and Cruise Associates acquires ownership of more than 30% of our common stock and our two principal shareholders, in the aggregate, own less of our common stock than such person and do not collectively have the right to elect, or to designate for election, at least a majority of the board of directors, we may be obligated to prepay indebtedness outstanding under the majority of our credit facilities, which we may be unable to replace on similar terms. If this were to occur, it would have an adverse impact on our liquidity and operations.
Aggregate cost of ships expected to enter service			$ 2,700,000,000
Deposit for the purchase of ships expected to enter service			294,800,000
Percentage of aggregate cost exposed to fluctuations in the euro exchange rate			2.90%	2.20%
Claim amounts sought					40,000,000
Treble damages sought by international representative						120,000,000
Initial lease contractual life	25Y	25Y
Lease term	10Y	10Y
Future payment if lease terminated	$ 118,500,000	£ 73,800,000
Optional lease cancelation period							10Y	18Y