Geographic Data - Net Sales by Country (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 29, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Oct. 01, 2011	Jul. 02, 2011	Apr. 02, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Total net sales	$ 253,179	$ 252,037	$ 247,077	$ 243,875	$ 247,308	$ 253,338	$ 245,541	$ 237,301	$ 996,168	$ 983,488	$ 894,359
Hardware [Member]
Segment Reporting Information [Line Items]
Total net sales									730,489	743,308	676,738
Supplies [Member]
Segment Reporting Information [Line Items]
Total net sales									212,499	187,457	167,633
Service And Software [Member]
Segment Reporting Information [Line Items]
Total net sales									47,941	47,206	44,829
Shipping And Handling [Member]
Segment Reporting Information [Line Items]
Total net sales									$ 5,239	$ 5,517	$ 5,159