Segment Information (Tables)

12 Months Ended

Sep. 30, 2017

Revenue, Major Customer [Line Items]

Consolidated Net Sales and Earnings by Segment

	Year Ended September 30,
	2017		2016		2015
Segment external net sales:
Aerospace	$	1,342,339	$	1,233,176	$	1,160,883
Industrial		756,346		789,902		877,420
Total consolidated net sales	$	2,098,685	$	2,023,078	$	2,038,303
Segment earnings:
Aerospace	$	257,813	$	232,166	$	187,747
Industrial		78,991		82,237		126,641
Nonsegment expenses		(58,352)		(63,166)		(49,362)
Interest expense, net		(25,705)		(24,751)		(24,077)
Consolidated earnings before income taxes	$	252,747	$	226,486	$	240,949

Consolidated Total Assets, Depreciation and Amortization, and Capital Expenditures by Segment

	Year Ended September 30,
	2017		2016		2015
Segment assets:
Aerospace	$	1,722,789	$	1,637,522	$	1,566,421
Industrial		695,264		705,169		653,848
Unallocated corporate property, plant and equipment, net		104,755		89,988		85,834
Other unallocated assets		234,301		209,683		206,301
Consolidated total assets	$	2,757,109	$	2,642,362	$	2,512,404
Segment depreciation and amortization:
Aerospace	$	47,277	$	40,825	$	46,488
Industrial		24,421		20,412		20,768
Unallocated corporate amounts		9,219		7,799		7,979
Consolidated depreciation and amortization	$	80,917	$	69,036	$	75,235
Segment capital expenditures:
Aerospace	$	62,812	$	90,749	$	150,021
Industrial		12,189		62,065		113,292
Unallocated corporate amounts		17,335		22,878		23,299
Consolidated capital expenditures	$	92,336	$	175,692	$	286,612

External Net Sales by Geographical Area

	Year Ended September 30,
	2017		2016		2015
United States	$	1,211,902	$	1,118,833	$	1,054,895
Europe (1)		478,725		537,901		569,322
Asia		288,252		228,683		241,875
Other countries		119,806		137,661		172,211
Consolidated net sales	$	2,098,685	$	2,023,078	$	2,038,303

(1) As a percentage of consolidated net sales, net sales to customers in Germany accounted for 8% for the year ended September 30, 2017, 10% for the year ended September 30, 2016 and 10% for the year ended September 30, 2015.

Property, Plant, and Equipment - Net by Geographical Area

	At September 30,
	2017		2016
United States	$	872,947	$	826,225
Germany		24,541		24,468
Other countries		24,555		25,657
Consolidated property, plant and equipment, net	$	922,043	$	876,350

U.S. Government Related [Member]

Revenue, Major Customer [Line Items]

U.S. Government Related Sales by Segment

	Direct U.S. Government Sales		Indirect U.S. Government Sales		Total U.S. Government Related Sales
Fiscal year ended September 30, 2017
Aerospace	$	106,685	$	362,536	$	469,221
Industrial		3,726		10,814		14,540
Total net external sales	$	110,411	$	373,350	$	483,761
Percentage of total net sales		5%		18%		23%
Fiscal year ended September 30, 2016
Aerospace	$	103,026	$	310,952	$	413,978
Industrial		6,550		9,845		16,395
Total net external sales	$	109,576	$	320,797	$	430,373
Percentage of total net sales		5%		16%		21%
Fiscal year ended September 30, 2015
Aerospace	$	92,322	$	258,391	$	350,713
Industrial		4,836		8,839		13,675
Total net external sales	$	97,158	$	267,230	$	364,388
Percentage of total net sales		5%		13%		18%