Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2016

Fair Value Disclosures [Abstract]

Schedule Of Fair Values Of Financial Instruments And Nonfinancial Assets And Liabilities Measured At The Reporting Date

The fair values of these financial instruments are summarized as follows:

			Fair Value Measurements at Reporting Date Using
Description	At September 30, 2016		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	869	$	—	$	869	$	—

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2015		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	4,388	$	—	$	4,388	$	—

Schedule Fair Value Measurements Balance Sheet Location

The fair value of the fuel hedge contracts outstanding as of September 30, 2016 and December 31, 2015 is as follows:

		Fair Value at
		September 30,			December 31,
	Balance Sheet Location	2016			2015
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	(28	)	$	—
Derivatives not designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets		897			—
Total asset derivatives		$	869		$	—
Liability derivatives:
Derivatives not designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	—		$	4,388

Fair Value, Assets Measured On Recurring Basis, Unobservable Input Reconciliation

The fair value of goodwill was determined using quantitative models that contained significant unobservable inputs. See Note 6.

	FairValue Measurements Using Significant Unobservable Inputs (Level 3)
	2015
Goodwill
Balance at January 1,	$	86,326
Impairment of goodwill		(2,750	)
Balance at December 31,	$	83,576

Changes In Components Of Accumulated Other Comprehensive Income (Loss)

Changes in the components of the accumulated balances of other comprehensive income (loss) are as follows:

	Three Months Ended						Nine Months Ended
	September 30,						September 30,
	2016			2015			2016			2015
Cumulative translation adjustments—net of tax	$	39		$	(639	)	$	596		$	(1,394	)
Derivatives:
Reclassification of derivative losses to earnings—net of tax		46			—			46			—
Change in fair value of derivatives—net of tax		(63	)		—			(63	)		—
Net unrealized gain on derivatives—net of tax		(17	)		—			(17	)		—
Total other comprehensive income (loss)	$	22		$	(639	)	$	579		$	(1,394	)

Adjustments Reclassified From Accumulated Other Comprehensive Loss To Earnings

Adjustments reclassified from accumulated balances of other comprehensive income (loss) to earnings are as follows:

		Three Months Ended		Nine Months Ended
		September 30,		September 30,
	Statement of Operations Location	2016		2016
Derivatives:
Fuelhedge contracts	Costs of contract revenues	$	76	$	76
	Income tax benefit		30		30
		$	46	$	46