Short-term Debt and Credit Lines (Tables)

12 Months Ended

Dec. 31, 2016

Debt Disclosure [Abstract]

Schedule of Short-Term Debt

Short-term debt at December 31, 2016 and 2015 consisted of:

	2016		2015
	(In thousands)
Notes payable to banks	$	8,200	$	5,860
Commercial paper	29,750		65,500
Total short-term debt	$	37,950	$	71,360