Significant Accounting Policies - Summary Of Assumptions For Options Granted (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Volatility factor	38.50%	39.40%	42.30%
Dividend yield	1.10%	1.00%	1.00%
Expected term (in years)	5 years 7 months 13 days	5 years 6 months 18 days	4 years 7 months 28 days
Risk-free rate	1.10%	1.30%	2.00%