Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2014

Fair Value [Abstract]

Assets and Liabilities Measured At Fair Value on Recurring Basis

The Company’s assets and liabilities measured at fair value on a recurring basis at June 30, 2014 and December 31, 2013, were as follows: 

	Fair Value Measurement at June 30, 2014 Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate swap derivative instruments – net liability position	$	(5,776)	$	-	$	(5,776)	$	-
Fuel hedge derivative instrument – net asset position	$	1,753	$	-	$	-	$	1,753
Restricted assets	$	36,069	$	36,069	$	-	$	-

	Fair Value Measurement at December 31, 2013 Using
	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate swap derivative instruments – net liability position	$	(5,226)	$	-	$	(5,226)	$	-
Fuel hedge derivative instrument – net asset position	$	2,199	$	-	$	-	$	2,199
Restricted assets	$	32,782	$	32,782	$	-	$	-

Change in Fair Value for Level 3 Derivatives

The following table summarizes the change in the fair value for Level 3 derivatives for the six months ended June 30, 2014:

		Level 3 Derivatives
Balance as of December 31, 2013	$	2,199
Realized gains included in earnings		(627)
Unrealized gains included in AOCL		181
Balance as of June 30, 2014	$	1,753

The following table summarizes the change in the fair value for Level 3 derivatives for the six months ended June 30, 2013: 

		Level 3 Derivatives
Balance as of December 31, 2012	$	1,187
Unrealized gains included in AOCL		48
Balance as of June 30, 2013	$	1,235