Segment and Geographic Information - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 29, 2018	Jun. 30, 2017	Jun. 29, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Net sales	$ 468,129	$ 449,006	$ 931,456	$ 884,947
Distribution
Disaggregation of Revenue [Line Items]
Net sales	$ 289,523	278,706	$ 573,455	550,324
Distribution | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Distribution | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			90 days
Distribution | Over time
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	2.00%		2.00%
Distribution | Bearings and Power Transmission
Disaggregation of Revenue [Line Items]
Net sales	$ 143,802	137,776	$ 287,187	272,698
Distribution | Automation, Control and Energy
Disaggregation of Revenue [Line Items]
Net sales	85,976	84,753	171,137	166,835
Distribution | Fluid Power
Disaggregation of Revenue [Line Items]
Net sales	59,745	56,177	115,131	110,791
Aerospace
Disaggregation of Revenue [Line Items]
Net sales	$ 178,606	170,300	$ 358,001	334,623
Revenue, Net, Percentage	100.00%		100.00%
Aerospace | Time-and-materials Contract | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Aerospace | Time-and-materials Contract | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			180 days
Aerospace | Fixed-price Contract | Minimum
Disaggregation of Revenue [Line Items]
Payment terms			30 days
Aerospace | Fixed-price Contract | Maximum
Disaggregation of Revenue [Line Items]
Payment terms			90 days
Aerospace | Over time
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	48.00%		50.00%
Aerospace | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	52.00%		50.00%
Aerospace | Military and Defense, excluding fuzes
Disaggregation of Revenue [Line Items]
Net sales	$ 51,743	50,675	$ 99,499	97,656
Aerospace | Missile and Bomb Fuzes
Disaggregation of Revenue [Line Items]
Net sales	41,601	36,165	94,586	71,379
Aerospace | Commercial Aerospace and Other
Disaggregation of Revenue [Line Items]
Net sales	$ 85,262	$ 83,460	$ 163,916	$ 165,588