Fair Value Measurements and Derivative Instruments (Non-Derivative Instruments) (Details) (Foreign currency debt) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2014 Current portion of long-term debt USD ($)	Dec. 31, 2013 Current portion of long-term debt USD ($)	Dec. 31, 2014 Long-term debt USD ($)	Dec. 31, 2013 Long-term debt USD ($)	Dec. 31, 2014 Pullmantur and TUI Cruises USD ($)	Dec. 31, 2014 Pullmantur and TUI Cruises EUR (€)	Dec. 31, 2013 Pullmantur and TUI Cruises USD ($)	Dec. 31, 2013 Pullmantur and TUI Cruises EUR (€)
Net investment hedge
Carrying Value of Non-derivative instrument Designated as hedging instrument	$ 168,718	$ 750,796	$ 0	$ 477,442	$ 168,718	$ 273,354	$ 168,700	€ 139,400	$ 750,800	€ 544,900