Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended								6 Months Ended	12 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Shipping and handling [Member]	Dec. 31, 2011 Shipping and handling [Member]	Dec. 31, 2010 Shipping and handling [Member]	Dec. 31, 2012 Software [Member]	Dec. 31, 2012 Minimum [Member]	Jun. 30, 2011 Minimum [Member] Machinery and equipment [Member]	Dec. 31, 2012 Minimum [Member] Machinery and equipment [Member]	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Maximum [Member] Intellectual property [Member]	Jun. 30, 2011 Maximum [Member] Machinery and equipment [Member]	Dec. 31, 2012 Maximum [Member] Machinery and equipment [Member]
Cash equivalents, highly liquid investments original maturity date	Three months or less
Estimated useful life									5 years	10 years			10 years	12 years
Decrease in cost of sales		$ 4,800,000
Increase in net income		5,200,000
Increase in net income per diluted share		$ 0.13
Estimated useful life of Intangible assets							5 years	1 year			5 years	10 years
Percentage of employees eligible for severance benefits	98.00%
Selling, general and administrative expenses	78,971,000	68,367,000	66,640,000	3,057,000	2,408,000	1,594,000
Advertising expense	$ 142,000	$ 148,000	$ 106,000
Percentage of royalty expenses paid	67.50%	78.60%	77.50%
Percentage of tax benefit realized upon settlement	50.00%