Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2021

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

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2021		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	630	$	—	$	630	$	—

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2020		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	1,739	$	—	$	1,739	$	—

The fair value of the fuel hedge contracts outstanding as of December 31, 2021 and 2020 is as follows:

	Balance Sheet Location	Fair Value at December 31,
		2021		2020
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Other current assets	$	630	$	1,739

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

		2021			2020			2019
Cumulative translation adjustments—net of tax	$	—		$	—		$	—
Derivatives:
Reclassification of derivative (gains) losses to earnings—net of tax		(6,481	)		5,825			1,458
Change in fair value of derivatives—net of tax		5,653			(5,152	)		2,646
Net unrealized (gain) loss on derivatives—net of tax		(828	)		673			4,104
Total other comprehensive income (loss)	$	(828	)	$	673		$	4,104

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

	Statement of Operations Location		2021			2020		2019
Derivatives:
Fuel hedge contracts	Costs of contract revenues	$	(8,670	)	$	7,703	$	1,975
	Income tax (provision) benefit		(2,189	)		1,878		517
		$	(6,481	)	$	5,825	$	1,458