Pension Plans and Other Postretirement Benefits Domestic and Foreign Pension and Postretirement Defined Benefit Plans (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Defined Benefit Plan Disclosure [Line Items]
Total net pension benefits cost (credit)	[1]	$ 1,412	$ (369)	$ 2,210	$ 99
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost		1,233	1,143	2,281	2,626
Interest cost		9,498	9,710	18,863	18,251
Expected return on assets		(10,337)	(11,753)	(20,509)	(21,965)
Actuarial gain		0	(51)	(50)	(51)
Amortization of prior service benefit		440	29	468	59
Total net pension benefits cost (credit)		834	(922)	1,053	(1,080)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost		28	5	57	71
Interest cost		621	619	1,242	1,287
Expected return on assets		(47)	(47)	(94)	(131)
Amortization of prior service benefit		(24)	(24)	(48)	(48)
Total net pension benefits cost (credit)		$ 578	$ 553	$ 1,157	$ 1,179

[1] For the three-month and six-month periods ended June 30, 2016, $0.6 million and $1.2 million, respectively, of net pension and postretirement benefits cost are included in (Loss) income from discontinued operations (net of tax) in the consolidated statements of (loss) income. For the three-month and six-month periods ended June 30, 2015, $0.8 million and ($1.2) million, respectively, of net pension and postretirement benefits cost (credit) are included in (Loss) income from discontinued operations (net of tax) in the consolidated statements of (loss) income. See Note 3, “Divestitures,” for additional information.