Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2016

Supplemental Cash Flow Elements [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

The Corporation's cash payments for interest and income taxes and non-cash investing and financing activities are as follows:

(In thousands)	2016		2015			2014
Cash paid for:
Interest paid (net of capitalized interest)		$6,644		$7,066			$8,301
Income taxes paid	23,120		28,252			36,637
Changes in accrued expenses due to:
Purchases of property and equipment	3,599		(327		)	3,873
Purchases of capitalized software	603		(2,806		)	2,183