Revenue - Revenue by Category (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Net sales	$ 371,669	$ 375,315	$ 748,360	$ 741,975
Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	233,404	249,577	475,906	495,538
Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	138,265	125,738	272,454	246,437
Americas [Member]
Disaggregation of Revenue [Line Items]
Net sales	189,273	185,775	383,705	367,746
Americas [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	87,146	93,326	185,434	189,320
Americas [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	102,127	92,449	198,271	178,426
Europe [Member]
Disaggregation of Revenue [Line Items]
Net sales	113,040	115,154	231,794	234,534
Europe [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	89,650	92,414	184,080	187,127
Europe [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	23,390	22,740	47,714	47,407
Asia [Member]
Disaggregation of Revenue [Line Items]
Net sales	67,672	72,893	129,018	136,147
Asia [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	55,469	63,043	104,411	117,382
Asia [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	12,203	9,850	24,607	18,765
Other Geographic Market [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,684	1,493	3,843	3,548
Other Geographic Market [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,139	794	1,981	1,709
Other Geographic Market [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	545	699	1,862	1,839
Engineered Components Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	65,539	73,364	135,223	150,454
Engineered Components Products [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	65,539	73,364	135,223	150,454
Engineered Components Products [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Molding Solutions Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	105,902	125,938	212,697	245,037
Molding Solutions Products [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	105,902	125,938	212,697	245,037
Molding Solutions Products [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Force & Motion Control Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	47,454	50,275	99,070	100,047
Force & Motion Control Products [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	47,454	50,275	99,070	100,047
Force & Motion Control Products [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Automation Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	14,509	0	28,916	0
Automation Products [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	14,509	0	28,916	0
Automation Products [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Aerospace Original Equipment Manufacturing Products [Member]
Disaggregation of Revenue [Line Items]
Net sales	93,884	84,527	181,822	165,223
Aerospace Original Equipment Manufacturing Products [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Aerospace Original Equipment Manufacturing Products [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	93,884	84,527	181,822	165,223
Aerospace Aftermarket Products and Services [Member]
Disaggregation of Revenue [Line Items]
Net sales	44,381	41,211	90,632	81,214
Aerospace Aftermarket Products and Services [Member] | Industrial [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0	0	0
Aerospace Aftermarket Products and Services [Member] | Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 44,381	$ 41,211	$ 90,632	$ 81,214
Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue transfered percent	90.00%		90.00%
Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue transfered percent	10.00%		10.00%