Consolidated Statements Of Shareholders' Equity (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Non-credit related other-than-temporary impairment on available for sale debt securities	$ 3,633	$ 828	$ 526
Non-credit related other-than-temporary impairment on available for sale debt securities, deferred tax	1,381	315	195
Net unrealized gain on available for sale debt securities	8,834	3,140	2,263
Net unrealized gain on available for sale debt securities, deferred tax	3,357	1,193	860
Reclassification adjustment for net realized gains included in net income	$ 4,006	$ 2,051	$ 1,497
Common stock, dividend per share			$ 0.06
Preferred Stock Series 2009 [Member]
Preferred stock, dividend per share	$ 80.00	$ 80.00	$ 20.00
Issuance of preferred stock	3,710	3,710	3,710
Preferred Stock Series 2011 [Member]
Preferred stock, dividend per share	$ 10.00
Issuance of preferred stock	12,000