Shareholders' Equity (Details) (USD $)	0 Months Ended		3 Months Ended	12 Months Ended						0 Months Ended	3 Months Ended				0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended						12 Months Ended
	Nov. 05, 2010	Jul. 28, 2005	Dec. 31, 2012	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 12, 2008	Dec. 31, 2012 Series A Preferred Stock [Member]	Dec. 31, 2011 Series A Preferred Stock [Member]	Jun. 19, 2012 Series B Preferred Stock [Member]	Dec. 31, 2012 Series B Preferred Stock [Member]	Feb. 15, 2014 Series B Preferred Stock [Member]	Dec. 31, 2011 Series B Preferred Stock [Member]	Dec. 12, 2008 Series B Preferred Stock [Member]	Dec. 12, 2008 Series B Preferred Stock [Member] Dividend Rate Declared, Before February 15, 2014 [Member]	Dec. 31, 2012 Series B Preferred Stock [Member] Dividend Rate Declared, Before February 15, 2014 [Member]	Dec. 12, 2008 Series B Preferred Stock [Member] Dividend Rate Declared, After February 15, 2014 [Member]	Dec. 31, 2012 Series B Preferred Stock [Member] Dividend Rate Declared, After February 15, 2014 [Member]	Dec. 31, 2012 Preferred Stock [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2012 Common Stock [Member] LNBB Direct Stock Purchase and Dividend Reinvestment Plan [Member]	Dec. 31, 2011 Common Stock [Member] LNBB Direct Stock Purchase and Dividend Reinvestment Plan [Member]	Jun. 30, 2001 Common Stock [Member] LNBB Direct Stock Purchase and Dividend Reinvestment Plan [Member]	Dec. 31, 2012 Retained Earnings [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized			1,000,000	1,000,000				150,000	150,000		25,223		25,223
Preferred stock, shares issued								0	0		18,880		25,223	25,223
Preferred stock, shares outstanding											19,000		25,223
Preferred stock, Series B, liquidation value											$ 1,000	$ 1,000	$ 1,000	$ 1,000
Preferred stock								$ 0	$ 0		$ 18,880,000		$ 25,223,000	$ 25,223
Preferred stock, dividend rate, percentage															5.00%	5.00%	9.00%	9.00%
Number of shares by warrant							561,343
Warrant, exercise price							6.74
U.S. Department of Treasury sale of Series B Preferred Stock, shares										25,223
U.S. Department of Treasury sale of Series B Preferred Stock, price per share										$ 856.13
Dutch auction of Series B Preferred Stock, initial public offering price										$ 869.17
Stock repurchased during period			6,343	(6,159,000)																				163,000
Stock repurchased during period, percentage											25.00%
Warrant repurchased mutually agreed price					1.53
Warrant repurchased equity value					860,000
Common stock, authorized			15,000,000	15,000,000		15,000,000
Common stock, issued			8,272,548	8,272,548		8,210,443
Common stock, shares, outstanding			7,944,000	7,944,000		7,882,000
Stock repurchase program, percentage of outstanding common shares		5.00%
Stock repurchase program, number of shares authorized to be repurchased		332,000
Treasury stock, number of shares held			328,000	328,000		328,194,000
Treasury stock, value			$ 6,092,000	$ 6,092,000		$ 6,092,000
Percentage of market value																			50.00%	50.00%
Preferred Share Purchase Right dividend, per share	1
Ownership percentage			10.00%	10.00%
Authorized shares under the Plan																							500,000
Shares purchased under the Plan																					9,936	13,795