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

3 Months Ended

Mar. 31, 2018

New Accounting Pronouncement, Early Adoption [Line Items]

Schedule of Prospective Adoption of New Accounting Pronouncements

The cumulative effect of the changes to the Company's Condensed Consolidated Balance Sheet as a result of adopting the new guidance was as follows:

(in thousands)	Balance as of December 31, 2017		Adjustments			Balance as of January 1, 2018
Assets
Accounts receivable, net	$	620,319	$	2,142		$	622,461
Inventories and contracts in progress	60,612		903			61,515
Other current assets	66,253		6,343			72,596
Liabilities
Accounts payable and accrued liabilities	$	526,323	$	88		$	526,411
Deferred revenue	339,454		(346		)	339,108
Deferred income taxes	362,701		2,197			364,898
Equity
Retained earnings	$	5,791,724	$	7,449		$	5,799,173

Schedule of New Accounting Pronouncements and Changes in Accounting Principles

The effect of these changes to the Condensed Consolidated Statement of Operations for the first quarter of 2017 is as follows:

	As Previously Reported		Adjustment			Upon Adoption
(in thousands)
Three Months Ended March 31, 2017
Operating expenses	$	300,666	$	25,021		$	325,687
Selling, general and administrative expenses	231,509		(6,220		)	225,289
Income from Operations	29,054		(18,801		)	10,253
Non-operating pension and postretirement benefit income, net	—		18,801			18,801
Income Before Income Taxes	23,786		—			23,786