Organization, Basis of Presentation and Recent Accounting Pronouncements (Tables)

9 Months Ended

Sep. 30, 2017

New Accounting Pronouncement, Early Adoption [Line Items]

New Accounting Pronouncement, Early Adoption

The prior period has been adjusted to reflect this adoption, as detailed below:

	Nine Months Ended September 30, 2016
	As
	Previously					As
(in thousands)	Reported			Adjustment		Adopted
Cash Flows from Operating Activities
Increase in Restricted Cash	$	(7,266	)	$	7,266	$	—
Net Cash Provided by Operating Activities	144,189			7,266		151,455
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(161,024		)	7,266		(153,758		)
Cash and Cash Equivalents and Restricted Cash at Beginning of Period	754,207			20,745		774,952
Cash and Cash Equivalents and Restricted Cash at End of Period	593,183			28,011		621,194

Schedule of Prospective Adoption of New Accounting Pronouncements

The Company will adopt the new standard in the first quarter of 2018, and expects the following changes to its financial statements upon adoption, as detailed below:

	Income from Operations			Non-operating pension and postretirement benefit income		Income Before Income Taxes
(in thousands)
Three Months Ended September 30, 2017
As Reported	$	44,571		$	—	$	38,244
Adjustment	(17,621		)	17,621		—
Upon Adoption	26,950			17,621		38,244
Three Months Ended September 30, 2016
As Reported	$	68,033		$	—	$	40,926
Adjustment	(15,705		)	15,705		—
Upon Adoption	52,328			15,705		40,926
Nine Months Ended September 30, 2017
As Reported	$	141,986		$	—	$	127,929
Adjustment	(55,042		)	55,042		—
Upon Adoption	86,944			55,042		127,929
Nine Months Ended September 30, 2016
As Reported	$	194,045		$	—	$	186,540
Adjustment	(46,966		)	46,966		—
Upon Adoption	147,079			46,966		186,540
Twelve Months Ended December 31, 2016
As Reported	$	303,534		$	—	$	250,658
Adjustment	(80,665		)	80,665		—
Upon Adoption	222,869			80,665		250,658