Indebtedness (Tables)

12 Months Ended

Dec. 31, 2012

Indebtedness

Summary of long-term debt

	2012		2011
	(in thousands)
Principal amount unsecured 5.0% senior notes due in 2018	$	95,000	$	95,000
Principal amount unsecured 5.75% senior notes due in 2021		95,000		95,000
Total	$	190,000		190,000