Fair Value Measurements and Derivative Instruments (Non-Derivative Instruments) (Details) - Foreign currency debt $ in Thousands, € in Millions	12 Months Ended
	Dec. 31, 2016 USD ($)	Dec. 31, 2016 EUR (€)	Dec. 31, 2015 USD ($)
Net investment hedge
Carrying Value of Non-derivative instrument Designated as hedging instrument	$ 311,225		$ 0
Pullmantur and TUI Cruises
Net investment hedge
Carrying Value of Non-derivative instrument Designated as hedging instrument	311,200	€ 295.0
Current portion of long-term debt
Net investment hedge
Carrying Value of Non-derivative instrument Designated as hedging instrument	61,601		0
Long-term debt
Net investment hedge
Carrying Value of Non-derivative instrument Designated as hedging instrument	$ 249,624		$ 0