Revenue (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Disaggregation of Revenue [Line Items]
Operating Leases, Income Statement, Lease Revenue									$ 149,684	$ 135,138
Sales to external customers	$ 383,861	$ 347,827	$ 351,663	$ 346,105	$ 412,468	$ 360,343	$ 348,628	$ 323,002	1,429,456	1,444,441	$ 1,339,541
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									592,755	563,386
United States
Disaggregation of Revenue [Line Items]
Sales to external customers									1,164,634	1,147,649
Europe [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									108,139	102,998
Asia [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									77,253	90,273
CANADA
Disaggregation of Revenue [Line Items]
Sales to external customers									65,223	80,083
AUSTRALIA
Disaggregation of Revenue [Line Items]
Sales to external customers									14,207	23,438
Manufactured Product, Other [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									247,102	287,775
Service
Disaggregation of Revenue [Line Items]
Sales to external customers									589,599	593,280	$ 537,239
Applied Product Technologies
Disaggregation of Revenue [Line Items]
Sales to external customers									485,274	533,607
Applied Product Technologies | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									335,227	344,097
Applied Product Technologies | Manufactured Product, Other [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									128,051	165,056
Applied Product Technologies | Service
Disaggregation of Revenue [Line Items]
Sales to external customers									21,996	24,454
Integrated Solutions and Services
Disaggregation of Revenue [Line Items]
Sales to external customers									944,182	910,834
Integrated Solutions and Services | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									257,528	219,289
Integrated Solutions and Services | Manufactured Product, Other [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									119,051	122,719
Integrated Solutions and Services | Service
Disaggregation of Revenue [Line Items]
Sales to external customers									567,603	568,826
Accounting Standards Update 2014-09 [Member]
Disaggregation of Revenue [Line Items]
Sales to external customers									$ 1,279,772	$ 1,309,303