Defined Benefit Pension Plans (Tables)

6 Months Ended

Jun. 30, 2015

Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]

Schedule of defined benefit plans disclosures

Net periodic benefit cost related to all of the Company's defined benefit pension plans recognized in the Company's unaudited Condensed Consolidated Statements of Income for the three months and six months ended June 30, 2015 and 2014 included the following components:

	Three months ended						Six months ended
(in thousands)	June 30, 2015			June 30, 2014			June 30, 2015			June 30, 2014
Service cost	$	671		$	706		$	1,432		$	1,404
Interest cost	8,045			8,996			16,272			17,914
Expected return on assets	(10,323		)	(11,600		)	(20,824		)	(23,062		)
Amortization of actuarial loss	2,952			2,840			6,264			5,844
Net periodic benefit cost	$	1,345		$	942		$	3,144		$	2,100