Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2019

Derivative Instrument Detail [Abstract]

Estimated Fair Value of Financial Instruments

The following table presents the estimated fair values of our financial instruments:

	March 31, 2019						December 31, 2018
(in thousands)	Carrying Amount			Fair Value			Carrying Amount			Fair Value
Derivative assets related to interest rate swaps (Level 2)	$	955		$	955		$	1,510		$	1,510
Derivative liabilities related to interest rate swaps (Level 2)	$	(11,210	)	$	(11,210	)	$	(2,888	)	$	(2,888	)
Long-term debt, including current portion (Level 2):
Term loans	$	(689,332	)	$	(695,948	)	$	(539,169	)	$	(539,037	)
Senior notes		-			-			(149,786	)		(154,328	)
Revenue bonds		(65,735	)		(66,912	)		(94,735	)		(93,144	)
Medium-term notes		(3,000	)		(3,428	)		(3,000	)		(3,419	)
Total long-term debt1	$	(758,067	)	$	(766,288	)	$	(786,690	)	$	(789,928	)
Company owned life insurance asset (COLI) (Level 3)	$	3,493		$	3,493		$	3,104		$	3,104

¹ The carrying amount of long-term debt includes principal and unamortized discounts.