Segments (Segment Information And Reconciliations To Consolidated Amounts) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 30, 2017	Sep. 30, 2017	Jul. 01, 2017	Apr. 01, 2017	Dec. 31, 2016	Sep. 29, 2018	Sep. 30, 2017	Oct. 01, 2016
Segment Reporting Information
Net sales	$ 700,866	$ 692,018	$ 689,049	$ 627,535	$ 649,268	$ 626,183	$ 632,403	$ 589,670	$ 2,709,468	$ 2,497,524	$ 2,411,937
Total operating profit									257,852	250,152	238,242
Interest expense									36,238	34,551	34,605
Equity-based compensation expense									5,804	4,582	3,271
Corporate expenses and other, net									31,973	29,308	27,506
Earnings before income taxes									183,837	181,711	172,860
Depreciation and amortization									88,572	90,167	98,732
Identifiable assets	2,964,048				3,090,592				2,964,048	3,090,592	3,004,974
Capital expenditures									94,517	75,798	67,208
Aircraft Controls
Segment Reporting Information
Net sales									1,193,505	1,124,885	1,063,718
Total operating profit									128,665	114,016	98,509
Depreciation and amortization									40,795	41,977	46,541
Identifiable assets	1,168,964				1,120,099				1,168,964	1,120,099	1,114,672
Capital expenditures									46,705	36,216	28,437
Space And Defense Controls
Segment Reporting Information
Net sales									580,877	529,203	499,449
Total operating profit									66,875	48,517	53,823
Depreciation and amortization									17,900	18,980	18,198
Identifiable assets	660,589				575,132				660,589	575,132	589,629
Capital expenditures									22,452	15,173	9,336
Industrial Systems
Segment Reporting Information
Net sales									935,086	843,436	848,770
Total operating profit									62,312	87,619	85,910
Depreciation and amortization									28,825	28,099	32,744
Identifiable assets	1,077,022				1,124,950				1,077,022	1,124,950	1,058,737
Capital expenditures									25,156	23,953	29,014
Corporate
Segment Reporting Information
Depreciation and amortization									1,052	1,111	1,249
Identifiable assets	$ 57,473				$ 270,411				57,473	270,411	241,936
Capital expenditures									$ 204	$ 456	$ 421