Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2021

Fair Value Disclosures [Abstract]

Summary of Items Measured at Fair Value

The following tables categorize items measured at fair value as of March 31, 2021 and December 31, 2020:

			Fair Value Measurement at Reporting Date Using
March 31, 2021			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
(Dollars in thousands)
Assets
Derivative contracts	$	6,323	$	—	$	6,323	$	—
Total	$	6,323	$	—	$	6,323	$	—
Liabilities					.
Derivative contracts	$	23,443	$	—	$	23,443	$	—
Total	$	23,443	$	—	$	23,443	$	—

			Fair Value Measurement at Reporting Date Using
December 31, 2020			Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
(Dollars in thousands)
Assets
Derivative contracts	$	10,218	$	—	$	10,218	$	—
Total	$	10,218	$	—	$	10,218	$	—
Liabilities
Derivative contracts	$	15,259	$	—	$	15,259	$	—
Total	$	15,259	$	—	$	15,259	$	—

Schedule of Carrying Values and Estimated Fair Values of Debt Instruments

The estimated fair value, as well as the carrying value, of the Company’s debt instruments are shown below:

	March 31, 2021		December 31, 2020
(Dollars in thousands)
Estimated aggregate fair value	$	628,761	$	624,207
Aggregate carrying value (1)		630,366		643,184

^{(1) Total debt excluding the impact of unamortized debt issuance costs.}