|
Fair Value Measurements and Derivatives - Additional Information (Detail)
In Millions, unless otherwise specified |
1 Months Ended | 12 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
Feb. 29, 2012
Sixthman
USD ($)
|
Dec. 31, 2012
Sixthman
USD ($)
|
Dec. 31, 2013
Fuel Swaps
Mg
|
Dec. 31, 2013
Fuel Swaps
Maximum
|
Dec. 31, 2013
Fuel Collars and Fuel Options
Mg
|
Dec. 31, 2013
Fuel Collars and Fuel Options
Maximum
|
Dec. 31, 2013
Foreign Exchange Option
USD ($)
|
Dec. 31, 2013
Foreign Exchange Option
EUR (€)
|
Dec. 31, 2013
Foreign Exchange Forward
USD ($)
|
Dec. 31, 2013
Foreign Exchange Forward
EUR (€)
|
Dec. 31, 2013
Foreign Currency Collar
USD ($)
|
Dec. 31, 2013
Foreign Currency Collar
EUR (€)
|
Dec. 31, 2013
Interest Rate Swap
USD ($)
|
|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | |||||||||||||||
| Derivative maturing date | Dec. 31, 2016 | Dec. 31, 2014 | |||||||||||||
| Projected fuel purchases | 641,000 | 34,000 | |||||||||||||
| Notional amount of derivatives | $ 137.4 | € 100.0 | $ 240.5 | € 175.0 | $ 137.4 | € 100.0 | $ 660.4 | ||||||||
| Fair value of long-term debt | 3,146.4 | 3,106.9 | |||||||||||||
| Fair value of long-term debt in excess of carrying value | 18.6 | 121.5 | |||||||||||||
| Business acquisition, purchase price | 7.5 | ||||||||||||||
| Business acquisition, cash paid | 4.0 | ||||||||||||||
| Business acquisition, contingent consideration | 3.5 | ||||||||||||||
| Business acquisition, goodwill and tradenames | $ 8.5 | ||||||||||||||