BUSINESS SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) segment	Jun. 30, 2021 USD ($)
BUSINESS SEGMENT INFORMATION
NET SALES	$ 219,066	$ 181,394	$ 601,004	$ 509,962
EBIT	30,833	19,423	69,091	57,085
Less: Interest expense	(1,331)	(480)	(3,084)	(1,453)
Earnings before income taxes	29,502	18,943	$ 66,007	55,632
Number of reportable segments | segment			3
Aerospace & Defense
BUSINESS SEGMENT INFORMATION
NET SALES	92,606	85,576	$ 247,671	234,720
EBIT	20,738	16,714	45,042	41,980
USG
BUSINESS SEGMENT INFORMATION
NET SALES	67,201	47,704	194,877	141,799
EBIT	13,135	8,227	37,840	27,683
Test
BUSINESS SEGMENT INFORMATION
NET SALES	59,259	48,114	158,456	133,443
EBIT	8,354	6,751	20,813	17,781
Corporate (loss)
BUSINESS SEGMENT INFORMATION
EBIT	$ (11,394)	$ (12,269)	$ (34,604)	$ (30,359)