Debt (Tables)

12 Months Ended

Dec. 31, 2010

Debt [Abstract]

Carrying Value Of Long-Term Debt Outstanding

	2010		2009
	(in thousands)
Long-term debt:
Senior notes:
$500 million, 6.45% due June 1, 2016	$	535,342	$	540,907
$500 million, 7.20% due June 15, 2018		508,005		508,799
$300 million, 6.30% due August 1, 2018		321,622		323,862
$250 million, 8.15% due June 15, 2038		266,892		267,070
Total senior notes		1,631,861		1,640,638
Other long-term borrowings		36,988		37,528
Total long-term debt	$	1,668,849	$	1,678,166