Contingencies (Detail) $ in Thousands	3 Months Ended
	Apr. 02, 2016 USD ($) AirCraft
Loss Contingencies [Line Items]
Number of Boeing aircraft subject to lawsuit | AirCraft	21
Civil penalties sought for each false claim made on or before September 28, 1999	$ 10
Civil penalties sought for each false claim made on or after September 28, 1999	11
Damages Equal to Contract Purchase Price
Loss Contingencies [Line Items]
Estimate of possible loss	1,600,000
Damages Equal to Alleged Diminished Value and Increased Maintenance Costs
Loss Contingencies [Line Items]
Estimate of possible loss	851,000
Structural Systems | El Mirage and Monrovia, California
Loss Contingencies [Line Items]
Reserve for estimated liability	1,500
Structural Systems | West Covina, California
Loss Contingencies [Line Items]
Reserve for estimated liability	400
Possible Loss, minimum	400
Possible Loss, maximum	$ 3,100