Business realignment and acquisition integration charges - Business segment information (Details) $ in Thousands	3 Months Ended
	Sep. 30, 2021 USD ($) employee	Sep. 30, 2020 USD ($) employee
Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Business realignment charges	$ 0	$ 614
Number of positions eliminated (employees) | employee	0	13
Segment Reconciling Items
Restructuring Cost and Reserve [Line Items]
Business realignment charges	$ 0	$ 564
Diversified Industrial | Operating Segments
Restructuring Cost and Reserve [Line Items]
Business realignment charges	$ 3,017	$ 10,572
Number of positions eliminated (employees) | employee	35	384
Aerospace Systems | Operating Segments
Restructuring Cost and Reserve [Line Items]
Business realignment charges	$ (3)	$ 3,951
Number of positions eliminated (employees) | employee	0	240