Capital Purchase Program and Stock Warrant (Details) (USD $)					0 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2009	Jan. 30, 2009	Jan. 30, 2009 Series A Cumulative Perpetual Preferred Stock [Member]	Dec. 31, 2009 Series A Cumulative Perpetual Preferred Stock [Member]
Equity, Class of Treasury Stock [Line Items]
Preferred stock issued under capital repurchase program (in shares)					22,000
Preferred stock, par value (in dollars per share)					$ 2.50
Liquidation preference per share (in dollars per shares)					$ 1,000
Warrants issued under capital repurchase program (in shares)			104,101	208,202
Common stock, par value (in dollars per share)	$ 2.50	$ 2.50		$ 2.50
Exercise price of warrants (in dollars per share)				15.85
Shares redeemed during period (in shares)						22,000