Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2018

Investments, All Other Investments [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 financial instruments at September 30, 2018:

	Carrying Amount		Fair Value
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	171,369	$	171,369
Liabilities:
Bank debt	$	1,557,478	$	1,557,478
5½% Senior Notes	300,000		304,089
4¾% Senior Notes	300,000		287,982
3¼% Senior Notes	754,260		779,769