Shareholders' Equity - Additional Information (Detail) (USD $) Share data in Millions, except Per Share data, unless otherwise specified	1 Months Ended		3 Months Ended	9 Months Ended		47 Months Ended
	Aug. 31, 2014	Jan. 31, 2014	Sep. 28, 2014	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Nov. 30, 2010 Maximum
Stockholders Equity Note Disclosure [Line Items]
Stock repurchase program, authorized amount							$ 200,000,000
Repurchase of stock, shares			0		0	2.6
Repurchase of stock, value						31,200,000
Common stock average price						$ 11.84
Dividends payable, amount per share	$ 0.06	$ 0.06
Dividends payable, date to be paid	Sep. 26, 2014	Jun. 02, 2014
Dividends payable, record date	Sep. 05, 2014	May 09, 2014
Dividend payment			$ 12,800,000	$ 24,428,000