Debt (Tables)

6 Months Ended

Jun. 30, 2011

Debt

Consolidated Debt

	December 31, 2010		June 30, 2011		Weighted-Average Interest Rate  at June 30, 2011 (1)
Revolving credit facility	$	15,000	$	150,000	0.7%
$250.0 million of 6.45% Notes due 2014	249,786		249,814		6.3%
$250.0 million of 5.65% Notes due 2016	252,466		252,252		5.7%
$250.0 million of 6.40% Notes due 2018	259,125		262,034		5.1%
$550.0 million of 6.55% Notes due 2019	581,890		580,216		5.9%
$300.0 million of 4.25% Notes due 2021	298,932		298,974		4.3%
$250.0 million of 6.40% Notes due 2037	248,949		248,956		6.3%
Total debt	$	1,906,148	$	2,042,246

(1) Weighted-average interest rate includes the impact of outstanding interest rate swaps, the amortization/accretion of discounts and premiums and the amortization/accretion of gains and losses realized on historical cash flow and fair value hedges (see Note 9—Derivative Financial Instruments for detailed information regarding our current interest rate swaps).