Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Fair Value Disclosures [Abstract]

Summary of Carrying Amounts and Estimated Fair Values of Other Financial Instruments

The following table summarizes the carrying amounts and estimated fair values of our other significant financial instruments at December 31:

	2018				2017
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	72,819	$	72,819	$	53,533	$	53,533
Liabilities:
Bank debt	$	951,800	$	951,800	$	903,945	$	903,945
5½% Notes	300,000		301,761		300,000		308,301
4¾% Notes	300,000		284,517		300,000		309,390
3¼% Notes	744,380		746,591		780,325		813,793