Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2014

Debt Disclosure [Abstract]

Long-Term Debt Instrument

Long-term debt at December 31 consisted of the following:

(in thousands)	2014		2013
Current portion of long-term debt:
Current portion of 5-year term loan facility expires 2019	$	20,625	$	—
6.080% senior notes, Series B, semi-annual interest payments, balloon due 2014		—		100,000
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015		25,000		—
Total current portion of long-term debt	$	45,625	$	100,000
Long-term debt:
Note agreements:
5.370% senior notes, Series D, quarterly interest payments, balloon due 2015	$	—	$	25,000
5.660% senior notes, Series C, semi-annual interest payments, balloon due 2016		25,000		25,000
4.500% senior notes, Series E, quarterly interest payments, balloon due 2018		100,000		100,000
4.200% senior notes, semi-annual interest payments, balloon due 2024		498,471		—
Total notes	$	623,471	$	150,000
Credit agreements:
Periodic payments of interest, LIBOR plus 1.00%, expires December 31, 2016	$	—	$	100,000
Quarterly payments of interest, LIBOR plus 1.00%, expires December 31, 2016		—		100,000
Periodic payments of interest, LIBOR plus 1.00%, expires December 31, 2016		—		30,000
5-year term-loan facility, periodic interest and principal payments, currently LIBOR plus 1.375%, expires May 20, 2019		529,375		—
5-year revolving-loan facility, periodic interest payments, currently LIBOR plus 1.175%, plus commitment fees of 0.20%, expires May 20, 2019		—		—
Revolving credit loan, quarterly interest payments, LIBOR plus up to 1.40% and availability fee up to 0.25%, expires December 31, 2016		—		—
Total credit agreements	$	529,375	$	230,000
Total long-term debt	$	1,152,846	$	380,000
Current portion of long-term debt	$	45,625	$	100,000
Total debt	$	1,198,471	$	480,000