Subsequent Events - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	Mar. 28, 2014	Mar. 30, 2014	Mar. 31, 2013	Mar. 31, 2014 Subsequent Event [Member]
Subsequent Event [Line Items]
Cash purchase price for outstanding ownership interest in Grass Valley				$ 220,000,000
Acquisition of outstanding shares				100.00%
Prepayment of purchase price	$ 4,400,000	$ 4,700,000	$ 9,475,000