Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2017

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, 2017:

	Carrying Amount		Fair Value
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	199,186	$	199,186
Liabilities:
Bank debt	$	1,475,712	$	1,475,712
5% Senior Notes	280,000		284,021
5½% Senior Notes	300,000		309,132
4¾% Senior Notes	300,000		309,561
3¼% Senior Notes	767,910		790,118