Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value Disclosures [Abstract]

Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The following fair value hierarchy table presents information about the Company's financial assets and liabilities measured at fair value on a recurring basis:

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31,   2019
Assets
Deferred compensation plan	$	18,381	$	—	$	—	$	18,381
Derivative instruments	—		44		3		47
Total assets	$	18,381	$	44	$	3	$	18,428
Liabilities
Deferred compensation plan	$	27,012	$	—	$	—	$	27,012
Derivative instruments	—		—		25		25
Total liabilities	$	27,012	$	—	$	25	$	27,037

(In thousands)	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Balance at    December 31,   2018
Assets
Deferred compensation plan	$	14,699	$	—	$	—	$	14,699
Derivative instruments	—		35,689		24,416		60,105
Total assets	$	14,699	$	35,689	$	24,416	$	74,804
Liabilities
Deferred compensation plan	$	25,780	$	—	$	—	$	25,780
Derivative instruments	—		—		2,440		2,440
Total liabilities	$	25,780	$	—	$	2,440	$	28,220

Reconciliation of Changes in Fair Value of Financial Assets and Liabilities Classified as Level 3

The following table sets forth a reconciliation of changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy:

	Year Ended December 31,
(In thousands)	2019			2018			2017
Balance at beginning of period	$	21,976		$	(28,398	)	$	(15,868	)
Total gain (loss) included in earnings	24,794			31,184			(1,866		)
Settlement (gain) loss	(46,792		)	19,190			(10,664		)
Transfers in and/or out of Level 3	—			—			—
Balance at end of period	$	(22	)	$	21,976		$	(28,398	)
Change in unrealized gains (losses) relating to assets and liabilities still held at the end of the period	$	(22	)	$	19,732		$	(28,398	)

Carrying Amount and Fair Value of Debt

The carrying amount and fair value of debt is as follows:

	December 31, 2019						December 31, 2018
(In thousands)	Carrying Amount			Estimated Fair Value			Carrying Amount		Estimated Fair Value
Long-term debt	$	1,220,025		$	1,260,259		$	1,226,104	$	1,202,994
Current maturities	(87,000		)	(88,704		)	—		—
Long-term debt, excluding current maturities	$	1,133,025		$	1,171,555		$	1,226,104	$	1,202,994