Goodwill and Other Intangible Assets (Details) - USD ($)		3 Months Ended		9 Months Ended
	Jul. 23, 2018	Sep. 30, 2018	Jun. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
Goodwill:
Goodwill, beginning of period				$ 690,223,000
Acquisition related				14,228,000
Foreign currency translation				(16,224,000)
Goodwill, end of period		$ 688,227,000		688,227,000
Goodwill impairment			$ 0
Other Intangible Assets:
Gross Amount		761,358,000		761,358,000		$ 741,058,000
Accumulated Amortization		(298,214,000)		(298,214,000)		(264,814,000)
Foreign currency translation		(16,737,000)		(16,737,000)		(11,972,000)
Other intangible assets		788,191,000		788,191,000		771,856,000
Intangible Assets, Future Amortization Expense
Amortization of intangible assets expected in 2018		43,000,000		43,000,000
Amortization of intangible assets expected in 2019		43,000,000		43,000,000
Amortization of intangible assets expected in 2020		39,000,000		39,000,000
Amortization of intangible assets expected in 2021		39,000,000		39,000,000
Amortization of intangible assets expected in 2022		39,000,000		39,000,000
Revenue sharing program payments		5,800,000		5,800,000	$ 0
Impairment of trade names, indefinite-lived intangible assets			$ 0
Trade name [Member]
Other Intangible Assets:
Unamortized intangible asset		43,570,000		43,570,000		42,770,000
Revenue sharing programs (RSPs) [Member]
Other Intangible Assets:
Gross Amount		299,500,000		299,500,000		293,700,000
Accumulated Amortization		(118,945,000)		(118,945,000)		(108,075,000)
Component repair programs (CRPs) [Member]
Other Intangible Assets:
Gross Amount		111,839,000		111,839,000		111,839,000
Accumulated Amortization		(20,855,000)		(20,855,000)		(16,508,000)
Customer lists/relationships [Member]
Other Intangible Assets:
Gross Amount		230,466,000		230,466,000		215,966,000
Accumulated Amortization		(74,953,000)		(74,953,000)		(65,385,000)
Patents and technology [Member]
Other Intangible Assets:
Gross Amount		87,052,000		87,052,000		87,052,000
Accumulated Amortization		(56,098,000)		(56,098,000)		(48,083,000)
Trademarks/trade names [Member]
Other Intangible Assets:
Gross Amount		11,950,000		11,950,000		11,950,000
Accumulated Amortization		(10,636,000)		(10,636,000)		(10,349,000)
Other [Member]
Other Intangible Assets:
Gross Amount		20,551,000		20,551,000		20,551,000
Accumulated Amortization		(16,727,000)		(16,727,000)		$ (16,414,000)
Industrial Gas Springs Group Holdings Limited (“IGS”) [Member]
Goodwill:
Acquisition related	$ 14,228,000
Goodwill expected to be tax deductible	0
Intangible Assets, Future Amortization Expense
Intangible assets acquired	15,300,000
Industrial Gas Springs Group Holdings Limited (“IGS”) [Member] | Trade name [Member]
Intangible Assets, Future Amortization Expense
Intangible assets acquired	$ 800,000
Industrial Gas Springs Group Holdings Limited (“IGS”) [Member] | Customer Relationships [Member]
Other Intangible Assets:
Range of life	16 years
Intangible Assets, Future Amortization Expense
Intangible assets acquired	$ 14,500,000
Industrial [Member]
Goodwill:
Goodwill, beginning of period				659,437,000
Acquisition related				14,228,000
Foreign currency translation				(16,224,000)
Goodwill, end of period		657,441,000		657,441,000
Aerospace [Member]
Goodwill:
Goodwill, beginning of period				30,786,000
Acquisition related				0
Foreign currency translation				0
Goodwill, end of period		$ 30,786,000		$ 30,786,000
Minimum [Member] | Customer lists/relationships [Member]
Other Intangible Assets:
Range of life				10 years
Minimum [Member] | Patents and technology [Member]
Other Intangible Assets:
Range of life				4 years
Minimum [Member] | Trademarks/trade names [Member]
Other Intangible Assets:
Range of life				10 years
Maximum [Member] | Revenue sharing programs (RSPs) [Member]
Other Intangible Assets:
Range of life				30 years
Maximum [Member] | Component repair programs (CRPs) [Member]
Other Intangible Assets:
Range of life				30 years
Maximum [Member] | Customer lists/relationships [Member]
Other Intangible Assets:
Range of life				16 years
Maximum [Member] | Patents and technology [Member]
Other Intangible Assets:
Range of life				10 years
Maximum [Member] | Trademarks/trade names [Member]
Other Intangible Assets:
Range of life				30 years
Maximum [Member] | Other [Member]
Other Intangible Assets:
Range of life				15 years