Earnings Per Share - Additional Information (Detail) (USD $)	1 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Earnings Per Share [Abstract]
Antidilutive securities excluded from computation of earnings per share amount		500,000	500,000	100,000
Additional authorized repurchase amount	$ 93,000,000
Number of shares repurchased		1,684,365	2,454,037
Repurchase of common stock, value		$ 62,056,000	$ 69,908,000	$ 159,547,000
Treasury stock reissued, shares		1,086,502	619,664	970,749