Costs Associated with Exit and Restructuring Activities Costs Associated with Exit and Restructuring Activities - June 2016 Plan (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jun. 03, 2016
Total restructuring, impairment and restructuring related charges
Restructuring charges	$ 135,000	$ 911,000	$ 375,000	$ 2,995,000
Document Period End Date			Jun. 30, 2020
June 2016 Plan
Restructuring Cost and Reserve [Line Items]
Actual costs incurred	10,530,000		$ 10,530,000
Total restructuring, impairment and restructuring related charges
Restructuring charges	0	$ 911,000	32,000	$ 2,995
Restructuring Reserve	48,000		48,000		$ 233,000
June 2016 Plan | Operating Earnings
Restructuring Cost and Reserve [Line Items]
Planned Costs						$ 13,400,000
Actual costs incurred	15,998,000		15,998,000
Equipment relocation | June 2016 Plan
Restructuring Cost and Reserve [Line Items]
Planned Costs						9,025,000
Other charges | June 2016 Plan
Restructuring Cost and Reserve [Line Items]
Planned Costs						1,300,000
Other charges | June 2016 Plan | Operating Earnings
Restructuring Cost and Reserve [Line Items]
Actual costs incurred	2,156,000		2,156,000
Workforce reduction | June 2016 Plan
Restructuring Cost and Reserve [Line Items]
Planned Costs						$ 3,075,000
Workforce reduction | June 2016 Plan | Operating Earnings
Restructuring Cost and Reserve [Line Items]
Actual costs incurred	$ 3,312,000		$ 3,312,000