Subsequent Event - Additional Information (Detail) (Subsequent Event [Member], USD $)	0 Months Ended		0 Months Ended
	Nov. 11, 2014	Nov. 05, 2014 Repurchase of Common Stock [Member]	Nov. 11, 2014 Accelerated Share Repurchase Program [Member]	Nov. 11, 2014 Accelerated Share Repurchase Program [Member] Investment Bank [Member]
Subsequent Event [Line Items]
Authorized repurchase of outstanding common stock		$ 30,000,000
Payments for repurchase of common stock				20,000,000
Shares repurchased			758,143
Fair value of common stock			16,000,000
Reduction in common stock			100,000
Reduction in additional paid in capital			(2,700,000)
Reduction in retained earnings			13,300,000
Initial payment to bank reported as reduction in retained earnings			$ 4,000,000
Maximum number of shares of common stock issued			1,870,907
Common stock closing stock price	$ 21.38
Volume weighted average price per share	$ 1.00
Volume Weighted average price description	For every $1.00 increase or decrease in the Company's VWAP, based on a closing stock price of $21.38 on November 11, 2014, the settlement amount will change by approximately 45,000 shares.
Stock issued for settlement	45,000