Indebtedness (Tables)

9 Months Ended

Sep. 30, 2011

Indebtedness

Schedule of long-term debt

	September 30,		December 31,
	2011		2010
	(in thousands)
Principal amount unsecured 5.0% senior notes due in 2018	$	95,000	—
Principal amount unsecured 5.75% senior notes due in 2021	95,000		—
Principal amount unsecured 5.60% senior notes due in 2011	—		190,000
Discount on unsecured 5.60% senior notes due in 2011	—		(1	)
Total	$	190,000	189,999