Capital Stock - Additional Information (Detail) (USD $) Share data in Thousands, unless otherwise specified	0 Months Ended	1 Months Ended	12 Months Ended
	Sep. 19, 2013	Dec. 31, 2007	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008
Changes In Equity And Comprehensive Income Line Items [Line Items]
Common stock available for issuance, Authorized			48,000	48,000
Preferred stock available for issuance			2,000	2,000
Stock repurchase program	$ 23,100,000	$ 5,000,000				$ 16,100,000
Additional authorized amount stock repurchase program	7,000,000
Extension of the repurchase period			Sep. 20, 2013
Repurchase of common stock			365	694
Aggregate purchase prices common stock shares			$ (1,513,000)	$ (2,643,000)	$ (3,229,000)
Prior Stock Repurchase Program [Member]
Changes In Equity And Comprehensive Income Line Items [Line Items]
Extension of the repurchase period			Sep. 19, 2014