Financial Instruments (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019:

	Carrying Amount		Fair Value
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	141,400	$	141,400
Liabilities:
Bank debt	$	1,352,731	$	1,352,731
5½% Senior Notes	300,000		303,069
4¾% Senior Notes	300,000		296,565
3¼% Senior Notes	729,170		755,056
Derivative instruments (accrued and other liabilities)	2,477		2,477