Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 28, 2019	Jun. 29, 2019	Mar. 30, 2019	Dec. 31, 2018	Sep. 29, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 7,796	$ 17,042	$ 22,356	$ 15,777	$ 38,090	$ 28,637	$ 34,776	$ 40,404	$ 62,971	$ 141,907	$ 8,122
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax benefit of $0, ($1,892), and $0, respectively									(15,335)	(65,185)	88,788
Interest rate hedge adjustments, net of tax (benefit) expense of ($4,831), ($538), and $5,001, respectively									6,173	2,636	4,486
Defined benefit pension plans, net of tax (benefit) expense of $1,152, $4,214, and $5,357, respectively									2,692	12,237	9,415
Total other comprehensive income (loss), net of tax									(6,470)	(50,312)	102,689
Comprehensive income									$ 56,501	$ 91,595	$ 110,811