Condensed Consolidated Statements of Comprehensive Income (unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Condensed Consolidated Statements of Comprehensive Income (unaudited) [Abstract]
Net income before preferred dividends	$ 2,847	$ 4,012	$ 7,620	$ 8,088
Investment securities available for sale:
Unrealized gains arising in period	1,696	1,037	1,550	948
Reclassification adjustment for net gains realized in earnings	0	0	(342)	0
Other comprehensive income before tax	1,696	1,037	1,208	948
Income tax provision	593	362	423	332
Other comprehensive income, net	1,103	675	785	616
Total comprehensive income	$ 3,950	$ 4,687	$ 8,405	$ 8,704