Employee Benefits, Defined Contribution Plans Narrative (Details) - Defined Contribution Plan	12 Months Ended
	Dec. 31, 2016 USD ($) productionfacilities	Dec. 31, 2015 USD ($)
Hourly bargaining unit employees
Defined Contribution Plan Disclosure [Line Items]
Number of production facilities	9
Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Number of production facilities	3
Hourly bargaining unit employees | Concurrent match
Defined Contribution Plan Disclosure [Line Items]
Number of production facilities	1
Hourly bargaining unit employees | Fixed rate and concurrent match
Defined Contribution Plan Disclosure [Line Items]
Number of production facilities	3
Hourly bargaining unit employees | No contributions required
Defined Contribution Plan Disclosure [Line Items]
Number of production facilities	2
Salaried and certain hourly employee | Concurrent match
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan employer concurrent match percentage	4.00%
Hired on or after January 1, 2004 | Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	2.00%
Hired on or after January 1, 2004 | Salaried and certain hourly employee | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	2.00%
Minimum | Hourly bargaining unit employees
Defined Contribution Plan Disclosure [Line Items]
Estimated annual contribution to pension and other postretirement benefit plans | $	$ 1,800,000	$ 1,900,000
Minimum | Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount | $	800
Minimum | Salaried and certain hourly employee
Defined Contribution Plan Disclosure [Line Items]
Estimated annual contribution to pension and other postretirement benefit plans | $	$ 7,200,000	$ 6,700,000
Minimum | Hired prior to January 1, 2004 | Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	2.00%
Minimum | Hired prior to January 1, 2004 | Salaried and certain hourly employee | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	2.00%
Maximum | Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined Contribution Plan, Employer Discretionary Contribution Amount | $	$ 2,400
Maximum | Hired prior to January 1, 2004 | Hourly bargaining unit employees | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	10.00%
Maximum | Hired prior to January 1, 2004 | Salaried and certain hourly employee | Fixed rate contributions
Defined Contribution Plan Disclosure [Line Items]
Defined contribution plan annual employer contribution percentage	10.00%