Pension Plans and Other Postretirement Benefits Domestic and Foreign Pension and Postretirement Defined Benefit Plans (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Total net pension benefits cost (credit)	[1]	$ 846	$ 37	$ 3,056	$ 136
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		842	1,301	3,123	3,927
Interest cost		9,115	9,228	27,978	27,479
Expected return on assets		(9,920)	(11,111)	(30,429)	(33,076)
Actuarial gain		0	0	(50)	(51)
Amortization of prior service benefit		230	30	698	89
Total net pension benefits cost (credit)		267	(552)	1,320	(1,632)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost		29	36	86	107
Interest cost		620	643	1,862	1,930
Expected return on assets		(46)	(66)	(140)	(197)
Amortization of prior service benefit		(24)	(24)	(72)	(72)
Total net pension benefits cost (credit)		$ 579	$ 589	$ 1,736	$ 1,768

[1] For the three-month and nine-month periods ended September 30, 2016, $3.7 million and $4.9 million, respectively, of net pension and postretirement benefits cost are included in Income (loss) from discontinued operations (net of tax) in the consolidated statements of income. For the three-month and nine-month periods ended September 30, 2015, $0.8 million and ($0.4) million, respectively, of net pension and postretirement benefits cost (credit) are included in Income (loss) from discontinued operations (net of tax) in the consolidated statements of income. See Note 3, “Divestitures,” for additional information.