Stockholders' Equity - Common Stock Purchased Including Purchase of Common Stock for Tax Withholdings (Narrative) (Detail) - USD ($)			12 Months Ended
	Mar. 06, 2015	Apr. 23, 2013	Dec. 31, 2015	Jan. 01, 2015	Jan. 01, 2014	Aug. 01, 2012	Jan. 03, 2011	Jan. 01, 2010	Jan. 01, 2009	Jul. 31, 2008
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase program, authorized amount (shares)				$ 15,000,000.0	$ 15,000,000.0	$ 25,000,000.0	$ 25,000,000.0	$ 25,000,000.0	$ 25,000,000.0	$ 50,000,000.0
Stock repurchased during period (shares)			897,177
2012 STIP and 2009 LTIP
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase price (usd per share)	$ 17.36	$ 12.92
Stock repurchased during period (shares)	220,330	108,459