Shareholders' Equity - Additional Information (Detail) (USD $)	0 Months Ended		1 Months Ended	12 Months Ended			1 Months Ended	12 Months Ended		12 Months Ended
	Dec. 13, 2013	May 30, 2012	Nov. 30, 2013	Dec. 31, 2013 Vote	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008 Series A Preferred Stock [Member]	Dec. 31, 2013 Series A Preferred Stock [Member]	Dec. 31, 2012 Series A Preferred Stock [Member]	Dec. 31, 2013 Stock Purchase Plan [Member]	Dec. 31, 2013 Profit Sharing Plan [Member]
Class of Stock [Line Items]
Reverse stock split	1 for 5
Number of shares converted to one share common stock	5
Reserved common shares for issuance										300,000	148,500
Common shares issued as a result of employee participation, aggregate										170,066	34,590
Fixed rate cumulative perpetual preferred stock issued							2,000		2,000
Preferred stock par value per share							$ 0.10	$ 0.10	$ 0.10
Warrant expiry period								10 years
Warrant to purchase shares of common stock							117,925
Common stock exercise price per share							$ 31.80
Preferred stock quarterly dividends rate							5.00%
Increase in dividend after five years							9.00%
Preferred stock, liquidation preference							$ 25,000
Duration after which, preferred stock dividend rate increases								5 years
Preferred stock redemption value				50,000,000				50,000,000
Accrued dividends								319,000
Purchase of stock warrant		81,000			81,000
Stock offering			75,000,000	46,976,000
Common stock net issuance costs			47,000,000	46,977,000	0	0
Capital received from investor to get approval from Federal Reserve Bank			$ 25,000,000
Common stock, number of voting rights per share				1
Treasury stock, shares issued				0	0