Debt (Tables)

3 Months Ended

Mar. 31, 2013

Debt

Schedule of long-term debt

	March 31,		December 31,
(all dollar amounts in thousands)	2013		2012
Unsecured private placement notes	$	150,000	$	150,000
Revolving-credit agreement with financial institutions	59,000		5,500
Commercial paper placement agreement	11,500		40,700
Total long-term debt	$	220,500	$	196,200