Earnings Per Share - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Basic and Diluted weighted-average common and potential common shares outstanding	33,948,000	32,852,000	32,043,000
Weighted-average options RSUs, and ESPP shares outstanding	4,424,000	5,793,000	4,657,000