Note 6. Restructuring -Textuals (Details) - USD ($) $ in Thousands	3 Months Ended					6 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015
Restructuring Expense and Other Related Items
Restructuring (Gain) Expense	$ 0		$ 2,014			$ (1,832)	$ 3,200
Achieved Annual Pre-tax Operating Income Savings	1,300					2,200
Gain (Loss) on Disposition of Property Plant Equipment						(2,083)	$ 105
Proceeds from Sale of Buildings						12,000
Restructuring and Related Cost, Cost Incurred to Date	10,787					$ 10,787
Percentage of Restructuring Costs Expected in Cash						91.00%
FY 2015 Post Falls Restructuring Plan
Restructuring Expense and Other Related Items
Anticipated Annual Pre-tax Operating Income Savings						$ 5,000
Restructuring and Related Cost, Cost Incurred to Date	9,741					9,741
FY 2015 Plane Fleet Reduction
Restructuring Expense and Other Related Items
Achieved Annual Pre-tax Operating Income Savings						800
Restructuring and Related Cost, Cost Incurred to Date	1,046					1,046
Transition and Other Employee Costs
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	4,900					4,900
Transition and Other Employee Costs | FY 2015 Post Falls Restructuring Plan
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	4,681					4,681
Transition and Other Employee Costs | FY 2015 Plane Fleet Reduction
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	224					224
Plant Closure and Other Exit Costs
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	6,900					6,900
Plant Closure and Other Exit Costs | FY 2015 Post Falls Restructuring Plan
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	6,857					6,857
Asset Write-Downs
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	1,100					1,100
Asset Write-Downs | FY 2015 Post Falls Restructuring Plan
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	284					284
Asset Write-Downs | FY 2015 Plane Fleet Reduction
Restructuring Expense and Other Related Items
Restructuring and Related Cost, Cost Incurred to Date	$ 822					822
Post Falls Land and Facility
Restructuring Expense and Other Related Items
Gain (Loss) on Disposition of Property Plant Equipment		$ 2,100				$ 2,100
Property, Plant and Equipment, Other Types
Restructuring Expense and Other Related Items
Gain (Loss) on Disposition of Property Plant Equipment				$ 200
Fair Value, Measurements, Nonrecurring | Property, Plant and Equipment, Other Types
Restructuring Expense and Other Related Items
Impairment of Long-Lived Assets to be Disposed of					$ 1,100