Debt (Tables)

3 Months Ended

Mar. 31, 2012

Debt [Abstract]

Debt

in thousands	March 31 2012		December 31 2011		March 31 2011
Short-term Borrowings
Bank line of credit		$0		$0		$300,000
Total short-term borrowings		$0		$0		$300,000
Long-term Debt
Bank line of credit		$0		$0		$0
5.60% notes due 2012 1		134,521		134,508		299,801
6.30% notes due 2013 2		140,367		140,352		249,754
Floating-rate term loan due 2015		0		0		450,000
10.125% notes due 2015 3		153,284		153,464		149,612
6.50% notes due 2016 4		517,503		518,293		0
6.40% notes due 2017 5		349,874		349,869		349,856
7.00% notes due 2018 6		399,702		399,693		399,666
10.375% notes due 2018 7		248,562		248,526		248,424
7.50% notes due 2021 8		600,000		600,000		0
7.15% notes due 2037 9		239,547		239,545		249,326
Medium-term notes		16,000		16,000		21,000
Industrial revenue bonds		14,000		14,000		14,000
Other notes		1,098		1,189		1,395
Total long-term debt including current maturities		$2,814,458		$2,815,439		$2,432,834
Less current maturities of long-term debt		144,706		134,762		5,238
Total long-term debt		$2,669,752		$2,680,677		$2,427,596
Estimated fair value of long-term debt		$2,864,657		$2,796,504		$2,544,368

¹  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $36 thousand, December 31, 2011 — $49 thousand and March 31, 2011 — $199 thousand. The effective interest rate for these notes is 6.57%.

²  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $77 thousand, December 31, 2011 — $92 thousand and March 31, 2011 — $246 thousand. The effective interest rate for these notes is 7.48%.

³  Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: March 31, 2012 — $3,604 thousand and December 31, 2011 — $3,802 thousand. Additionally, includes decreases for unamortized discounts, as follows: March 31, 2012 — $320 thousand, December 31, 2011 — $338 thousand, and March 31, 2011 $388 thousand. The effective interest rate for these notes is 9.59%.

⁴  Includes an increase for the unamortized portion of the deferred gain realized upon the August 2011 settlement of interest rate swaps, as follows: March 31, 2012 — $17,503 thousand and December 31, 2011 — $18,293 thousand. The effective interest rate for these notes is 6.02%.

⁵  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $126 thousand, December 31, 2011 — $131 thousand and March 31, 2011 — $144 thousand. The effective interest rate for these notes is 7.41%.

⁶  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $298 thousand, December 31, 2011 — $307 thousand and March 31, 2011 — $334 thousand. The effective interest rate for these notes is 7.87%.

⁷  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $1,438 thousand, December 31, 2011 — $1,474 thousand and March 31, 2011 — $1,576 thousand. The effective interest rate for these notes is 10.62%.

⁸  The effective interest rate for these notes is 7.75%.

⁹  Includes decreases for unamortized discounts, as follows: March 31, 2012 — $641 thousand, December 31, 2011 — $643 thousand and March 31, 2011 — $674 thousand. The effective interest rate for these notes is 8.05%.