Debt - Details of Debt (Detail) - USD ($) $ in Thousands		Sep. 28, 2019	Dec. 31, 2018
Outstanding Debt:
Unamortized debt issuance costs		$ (2,264)	$ (2,703)
Outstanding Debt		386,556	400,452
Less current portion of long-term debt		59,894	51,903
Total long-term debt, net of current portion		326,662	348,549
Credit and Security Agreement [Member] | Term Loan [Member]
Outstanding Debt:
Outstanding Debt	[1]	$ 146,250	150,000
Credit facility, Interest Rates	[1]	3.52%
Credit and Security Agreement [Member] | Revolver [Member]
Outstanding Debt:
Outstanding Debt	[1]	$ 65,589	80,588
Credit facility, Interest Rates	[1]	3.52%
Equipment Financing [Member]
Outstanding Debt:
Outstanding Debt	[2]	$ 138,111	126,162
Equipment Financing [Member] | Minimum [Member]
Outstanding Debt:
Credit facility, Interest Rates	[2]	3.18%
Equipment Financing [Member] | Maximum [Member]
Outstanding Debt:
Credit facility, Interest Rates	[2]	5.13%
Real Estate Financing [Member]
Outstanding Debt:
Outstanding Debt	[3]	$ 38,870	45,864
Credit facility, Interest Rates	[3]	4.27%
Margin Facility [Member]
Outstanding Debt:
Outstanding Debt	[4]		$ 541
Credit facility, Interest Rates	[4]	3.13%

[1] The Credit and Security Agreement (the “Credit Agreement”) provides for maximum borrowings of $350 million in the form of a $150 million term loan and a $200 million revolver. Term loan proceeds were advanced on November 27, 2018 and mature on November 26, 2023. The term loan will be repaid in consecutive quarterly installments, as defined in the Credit Agreement, commencing March 31, 2019, with the remaining balance due at maturity. Borrowings under the revolving credit facility may be made until and mature on November 26, 2023. Borrowings under the Credit Agreement bear interest at LIBOR or a base rate, plus an applicable margin for each based the Company’s leverage ratio.  The Credit Agreement is secured by a first priority pledge of the capital stock of applicable subsidiaries, as well as first priority perfected security interest in cash, deposits, accounts receivable, and selected other assets of the applicable borrowers.  The Credit Agreement includes customary affirmative and negative covenants and events of default, as well as financial covenants requiring minimum fixed charge coverage and leverage ratios, and customary mandatory prepayments provisions. At September 28, 2019, we were in compliance with all covenants under the facility, and $134.4 million was available for borrowing on the revolver.

[2] The Equipment Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance transportation equipment. The equipment notes, which are secured by liens on selected titled vehicles, include certain affirmative and negative covenants and are generally payable in 60 monthly installments and bear interest at fixed rates ranging from 3.18% to 5.13%. At September 28, 2019, we were in compliance with all covenants.

[3] The Real Estate Financing consists of a series of promissory notes issued by a wholly-owned subsidiary in order to finance certain real property. The promissory notes, which are secured by first mortgages and assignment of leases on specific parcels of real estate and improvements, include certain affirmative and negative covenants and are generally payable in 120 monthly installments. Each of the notes bears interest at LIBOR plus 2.25%. At September 28, 2019, we were in compliance with all covenants.

[4] The Margin Facility is a short-term line of credit secured by our portfolio of marketable securities. It bears interest at LIBOR plus 1.10%. The amount available under the line of credit is based on a percentage of the market value of the underlying securities. At September 28, 2019, the maximum available borrowings under the line of credit were $5.0 million.