Segment Information (Tables)

6 Months Ended

Mar. 31, 2020

Segment Information [Abstract]

Summary of Consolidated Net Sales and Earnings by Segment

	Three-Months Ended				Six-Months Ended
	March 31,				March 31,
	2020		2019		2020		2019
Segment external net sales:
Aerospace	$	474,236	$	482,954	$	948,161	$	875,841
Industrial		245,984		275,890		492,414		535,814
Total consolidated net sales	$	720,220	$	758,844	$	1,440,575	$	1,411,655
Segment earnings:
Aerospace	$	117,638	$	101,722	$	210,549	$	174,576
Industrial		25,972		27,128		54,202		56,297
Nonsegment expenses		(28,131)		(27,496)		(79,202)		(56,497)
Interest expense, net		(8,280)		(11,186)		(16,802)		(22,693)
Consolidated earnings before income taxes	$	107,199	$	90,168	$	168,747	$	151,683

Summary of Consolidated Total Assets by Segment

	March 31, 2020		September 30, 2019
Segment assets:
Aerospace	$	1,892,325	$	1,900,657
Industrial		1,541,137		1,561,441
Unallocated corporate property, plant and equipment, net		105,881		114,887
Other unallocated assets		520,933		379,541
Consolidated total assets	$	4,060,276	$	3,956,526