Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 17,455	$ 17,224	$ 43,727	$ 51,664
Foreign currency translation adjustments	1,050	(1,109)	1,085	(3,945)
Unrealized gain on derivative instruments, net of tax expense/(benefit) of $205 and $38 and ($227) and $134, respectively	338	62	(374)	221	[1]
Change in pension and post-retirement benefit plan liabilities, net of tax expense of $1,213 and $961 and $3,641 and $2,883, respectively	2,005	1,587	6,015	4,763	[2]
Other comprehensive income	3,393	540	6,726	1,039
Comprehensive income	$ 20,848	$ 17,764	$ 50,453	$ 52,703

[1] See Note 6, Derivative Financial Instruments, for additional information regarding our derivative instruments.

[2] These accumulated other comprehensive income components are included in the computation of net periodic pension cost. (See Note 10, Pension Plans for additional information.)