Leases - Quantitative data related to our leases (Detail) $ in Thousands	6 Months Ended
	Jun. 29, 2019 USD ($)
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	$ 11,687
Operating cash flows from finance leases	5,663
Financing cash flows from finance leases	4,346
Liabilities
Total leased liabilities	$ 170,864
Weighted-average remaining lease term - operating leases	9 years 3 months 18 days
Weighted-average remaining lease term - finance leases	10 years 8 months 12 days
Weighted-average discount rate - operating leases	3.80%
Weighted-average discount rate - finance leases	31.60%
Maturity Of Lease Liabilities [Abstract]
2019	$ 11,337
2020	18,444
2021	15,836
2022	14,034
2023	11,020
Thereafter	40,924
Total lease payments	111,595
Less imputed interest	(20,120)
Present value of lease liabilities	91,475
2019	9,493
2020	18,333
2021	17,858
2022	17,064
2023	15,221
Thereafter	79,241
Total lease payments	157,210
Less imputed interest	(77,821)
Present value of lease liabilities	79,389
Accrued expenses and other current liabilities
Liabilities
Current operating	17,761
Current finance	8,140
Deferred credits and other liabilities
Liabilities
Non-current operating	73,714
Non-current finance	71,249
Property, plant and equipment, net
Assets
Operating lease assets	91,084
Finance lease assets	65,445
Total leased assets	$ 156,529