Summary of Significant Accounting Policies - Additional Information (Detail) $ in Thousands		12 Months Ended
		Dec. 31, 2016 USD ($) Plans	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Accrued customer rebates included in Accrued liabilities		$ 65,300	$ 63,600
Prepaid customer rebates included in Other current assets and Other assets		$ 47,900	36,300
Number of share-based compensation plans | Plans		2
Outstanding checks		$ 34,300	46,000
Receivables related to supplier allowances included Accounts receivable		$ 86,900	$ 111,000
Percentage inventory valued under LIFO		98.30%	98.40%
Higher inventory if FIFO applied entirely		$ 147,900	$ 147,800
Effect of LIFO inventory liquidation on income		800	1,100	$ 900
LIFO expense related to inflation increase in cost of sales		2,400	7,800	18,300
Increase (decrease) in cost of sales due to LIFO accounting method		1,600	6,700	17,400
Capitalized software amortization		8,800	8,500	7,400
Goodwill		297,906	299,355
Intangible assets, net		83,690	96,413
Pension expense		5,100	5,400	3,600
Pension settlement charge		12,510
Loss from foreign currency translation	[1]	1,427	(9,075)	$ (5,262)
Mexican Subsidiary [Member]
Summary Of Significant Accounting Policies [Line Items]
Loss from foreign currency translation			$ (11,100)
Pension Plans [Member]
Summary Of Significant Accounting Policies [Line Items]
Pension expense		17,600
Pension settlement charge		$ 12,510
Minimum [Member] | Fixtures And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		2 years
Maximum [Member] | Fixtures And Equipment [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Maximum [Member] | Building [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		40 years
Maximum [Member] | Capitalized Software [Member]
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		10 years
Nestor Sales LLC [Member]
Summary Of Significant Accounting Policies [Line Items]
LIFO reserve reduction		$ 1,500
Goodwill		$ 9,712

[1] Revised in 2015 for the impact of the changes in accounting principle related to inventory accounting.