Financial Instruments (Tables)

9 Months Ended

Sep. 30, 2015

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, 2015:

	Carrying Amount		Fair Value
	(Dollars in thousands)
Assets:
Cash and cash equivalents	$	104,203	$	104,203
Liabilities:
Bank debt	$	1,131,814	$	1,131,814
5½% Senior Notes	300,000		310,410
5% Senior Notes	500,000		503,750
Interest rate swap agreements	1,465		1,465
Natural gas swap agreements	626		626