Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2020

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 March 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	$	8,695	$	—	$	8,695	$	—

			Fair Value Measurements at Reporting Date Using
Description	At December 31, 2019		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Fuel hedge contracts	$	849	$	—	$	849	$	—

Schedule of Fair Value of Fuel Hedge Contracts Balance Sheet Location

The fair value of the fuel hedge contracts outstanding as of March 31, 2020 and December 31, 2019 is as follows:

		Fair Value at
		March 31,		December 31,
	Balance Sheet Location	2020		2019
Asset derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Prepaid expenses and other current assets	$	—	$	849
Liability derivatives:
Derivatives designated as hedging instruments
Fuel hedge contracts	Accrued expenses	$	8,695	$	—

Changes in Components of Accumulated Other Comprehensive Income

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

	Three Months Ended
	March 31,
	2020			2019
Derivatives:
Reclassification of derivative losses to earnings—net of tax		1,338			891
Change in fair value of derivatives—net of tax		(8,464	)		1,849
Total other comprehensive income (loss)	$	(7,126	)	$	2,740

Adjustments Reclassified from Accumulated Balances Other Comprehensive Income (Loss) to Earnings

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

		Three Months Ended
		March 31,
	Statement of Operations Location	2020		2019
Derivatives:
Fuel hedge contracts	Costs of contract revenues	$	1,792	$	1,207
	Income tax benefit		454		316
		$	1,338	$	891