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

6 Months Ended

Jun. 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:

	Six Months Ended June 30, 2016
	As
	Previously					As
(in thousands)	Reported			Adjustment		Adopted
Cash Flows from Operating Activities
Increase in Restricted Cash	$	(11,133	)	$	11,133	$	—
Net Cash Provided by Operating Activities	135,468			11,133		146,601
Net Decrease in Cash and Cash Equivalents and Restricted Cash	(153,867		)	11,133		(142,734		)
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	600,340			31,878		632,218

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 June 30, 2017
As Reported	$	68,361		$	—	$	65,899
Adjustment	(18,620		)	18,620		—
Upon Adoption	49,741			18,620		65,899
Three Months Ended June 30, 2016
As Reported	$	74,140		$	—	$	84,999
Adjustment	(15,584		)	15,584		—
Upon Adoption	58,556			15,584		84,999
Six Months Ended June 30, 2017
As Reported	$	97,415		$	—	$	89,685
Adjustment	(37,421		)	37,421		—
Upon Adoption	59,994			37,421		89,685
Six Months Ended June 30, 2016
As Reported	$	126,012		$	—	$	145,614
Adjustment	(31,261		)	31,261		—
Upon Adoption	94,751			31,261		145,614
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