Subsequent Events - Additional Information (Detail) - USD ($)		3 Months Ended	6 Months Ended
	Jul. 01, 2017	Sep. 30, 2017	Jun. 30, 2017
Credit Agreement [Member]
Subsequent Event [Line Items]
Credit agreement interest rate description			(i) LIBOR plus a specified margin based upon the Borrowers' total net leverage ratio (as defined in the Credit Agreement) (the "Total Net Leverage Ratio"), or (ii) the base rate (which is the highest of (a) the administrative agent's prime rate, (b) the federal funds rate plus 0.50% or (c) the sum of 1% plus one-month LIBOR) plus a specified margin based upon the Total Net Leverage Ratio.
Credit Agreement covenant terms			The Credit Agreement contains various restrictions and covenants, including negative covenants that limit or restrict dividends, indebtedness of subsidiaries, mergers and fundamental changes, asset sales, acquisitions, liens and encumbrances, transactions with affiliates, changes in fiscal year and other matters customarily restricted in such agreements. The Company must maintain a Total Net Leverage Ratio of (a) total funded debt as of such date, minus up to $50,000,000 in unrestricted cash and cash equivalents (each as defined in the Credit Agreement) to (b) consolidated EBITDA (as defined in the credit agreement) of not more than 3.00 to 1.00; provided that as of the close of each of the four fiscal quarters occurring after the consummation of a permitted acquisition (as defined in the Credit Agreement) with an aggregate consideration of $150,000,000 or more, such ratio shall not be more than 3.25 to 1.00. The Company must maintain an interest coverage ratio of consolidated EBITDA to consolidated cash interest expense of not less than 3.00 to 1.00.
Credit Agreement [Member] | Scenario Forecast [Member]
Subsequent Event [Line Items]
Financing costs related to the credit agreement		$ 1,300,000
Subsequent Event [Member] | Credit Agreement [Member]
Subsequent Event [Line Items]
Amount of credit agreement	$ 350,000,000
Commitment fee on unused commitments	0.25%
Debt covenant permitted aggregate consideration	$ 150,000,000
Subsequent Event [Member] | Credit Agreement [Member] | Maximum [Member]
Subsequent Event [Line Items]
Restricted cash and cash equivalents	$ 50,000,000
Total leverage ratio	3.00%
Total leverage ratio for following four each fiscal quarters	3.25%
Subsequent Event [Member] | Credit Agreement [Member] | Minimum [Member]
Subsequent Event [Line Items]
Interest coverage ratio	3.00%
Subsequent Event [Member] | Credit Agreement [Member] | Federal Funds Rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	0.50%
Subsequent Event [Member] | Credit Agreement [Member] | LIBOR rate [Member]
Subsequent Event [Line Items]
Interest rate under the credit agreement	1.00%
Description of variable rate basis	one-month LIBOR
Subsequent Event [Member] | Credit Agreement [Member] | Eurodollar
Subsequent Event [Line Items]
Interest rate under the credit agreement	2.00%
Subsequent Event [Member] | Credit Agreement [Member] | Base Rate
Subsequent Event [Line Items]
Interest rate under the credit agreement	1.00%
Subsequent Event [Member] | Letter of Credit
Subsequent Event [Line Items]
Commitment fee on unused commitments	2.00%
Estenson Logistics, LLC [Member]
Subsequent Event [Line Items]
Business acquisition, Closing Date			Jul. 01, 2017
Business acquisition costs			$ 1,500,000
Estenson Logistics, LLC [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Business acquisition, purchase price	$ 286,000,000
Business acquisition, debt assumed	114,000,000
Business acquisition, cash paid	111,000,000
Amount borrowed under new line of credit	55,000,000
Contingent consideration related to an earn-out provision	$ 6,000,000