XML 13 R33.htm IDEA: XBRL DOCUMENT

Fair Value Measurements (Details 4) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Fair value of Derivative Instruments
Fair value of derivatives	$ 2	$ 443
Interest rate contracts \| Accrued expenses \| Derivatives not designated as hedging instruments
Fair value of Derivative Instruments
Fair value of derivatives	18	406
Fuel commodity derivatives \| Accrued expenses \| Derivatives not designated as hedging instruments
Fair value of Derivative Instruments
Fair value of derivatives		37
Fuel commodity derivatives \| Current Assets \| Derivatives not designated as hedging instruments
Fair value of Derivative Instruments
Fair value of derivatives	$ (16)

Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

+ References+ Details