Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2013

Fair Value Measurements

Summary of the basis used to measure certain financial assets and financial liabilities at fair value on a recurring basis

			Basis of Fair Value Measurments
	Balance at March 31, 2013		Quoted Prices In Active Markets for Identical Items (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Interest rate swap derivative financial instruments (included in accrued expenses)	$	18	$	—	$	18	$	—
Fuel commodity derivatives (included in current assets)	$	16	$	—	$	—	$	16

Schedule of fuel commodity derivative activity

Balance, December 31, 2012	$	(37	)
Realized gains	—
Unrealized gains	53
Settlements	—
Balance, March 31, 2013	$	16

Schedule of details of each remaining interest rate Swap Agreement

			Notional	Notional
	Original		Amount	Amount
Date of	Notional		Fixed/	March 31,		Expiration	Fixed
Origin	Amount		Amortizing	2013		Date	Rate
May 8, 2008	$	45,000	Amortizing	$	25,000	Apr 1, 2013	3.78	%
May 8, 2008	$	40,000	Amortizing	$	21,000	Apr 1, 2013	3.78	%

Schedule of impact of the derivative instruments on the Condensed Consolidated Balance Sheets

Fair Values of Derivative Instruments

	Liability Derivatives
	December 31, 2012			March 31, 2013
	Balance Sheet Location	Fair Value		Balance Sheet Location	Fair Value
Derivatives designated as hedging instruments:
Interest rate contracts	Accrued expenses	$	—	Accrued expenses	$	—
Interest rate contracts	Other liabilites	—		Other liabilites	—
Derivatives not designated as hedging instruments:
Interest rate contracts	Accrued expenses	406		Accrued expenses	18
Fuel commodity derivatives	Accrued expenses	37		Current Assets	(16		)
Total derivatives		$	443		$	2

Schedule of effect of derivative instruments on the Consolidated Statements of Income and Comprehensive Income

The Effect of Derivative Instruments on the Consolidated Statements of Income and Comprehensive Income

for the three months ended March 31, 2012 and 2013

							Amount of Loss
						Location of Loss	Reclassified from
	Amount of Loss Recognized					Reclassified from	Accumulated OCI into							Location of	Amount of Gain or (Loss)
Derivatives in	in OCI on Derivative					Accumulated	Income (Effective						Derivatives Not	Gain or (Loss)	Recognized in Income on
Net Investment	(Effective Portion)					OCI into Income	Portion)						Designated as	Recognized in	Derivative
Hedging	March 31,					(Effective	March 31,						Hedging	Income on	March 31,
Relationships	2012			2013		Portion)	2012			2013			Instruments	Derivative	2012			2013
Interest rate contracts:						Interest expense, including the change in the fair value of non-hedged derivative instruments:							Interest rate contracts:	Interest expense, including the change in the fair value of non-hedged derivative instruments:
Unrealized	$	(67	)	$	—	Unrealized	$	(301	)	$	(207	)		Unrealized	$	390		$	388
Realized	(162		)	—		Realized	(162		)	—				Realized	(293		)	(398		)
Total	$	(229	)	$	—	Total	$	(463	)	$	(207	)		Total	$	97		$	(10	)
Fuel commodity derivatives:						Cost of revenue:							Fuel commodity derivatives:	Cost of revenue:
Unrealized	$	—		$	—	Unrealized	$	—		$	—			Unrealized	$	250		$	53
Realized	—			—		Realized	—			—				Realized	13			—
Total	$	—		$	—	Total	$	—		$	—			Total	$	263		$	53