Securities (Details 1) (USD $) In Thousands, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Trust preferred securities [Member]	Dec. 31, 2012 Trust preferred securities [Member]	Sep. 30, 2012 Trust preferred securities [Member]	Sep. 30, 2013 Other debt securities [Member]	Dec. 31, 2012 Other debt securities [Member]	Sep. 30, 2012 Other debt securities [Member]	Sep. 30, 2013 Equity Securities [Member]	Dec. 31, 2012 Equity Securities [Member]	Sep. 30, 2012 Equity Securities [Member]	Sep. 30, 2013 Obligations of other U.S. Government agencies and corporations [Member]	Dec. 31, 2012 Obligations of other U.S. Government agencies and corporations [Member]	Sep. 30, 2012 Obligations of other U.S. Government agencies and corporations [Member]	Sep. 30, 2013 Government agency mortgage backed securities [Member] Residential mortgage backed securities [Member]	Dec. 31, 2012 Government agency mortgage backed securities [Member] Residential mortgage backed securities [Member]	Sep. 30, 2012 Government agency mortgage backed securities [Member] Residential mortgage backed securities [Member]	Sep. 30, 2013 Government agency mortgage backed securities [Member] Commercial mortgage backed securities [Member]	Dec. 31, 2012 Government agency mortgage backed securities [Member] Commercial mortgage backed securities [Member]	Sep. 30, 2012 Government agency mortgage backed securities [Member] Commercial mortgage backed securities [Member]	Sep. 30, 2013 Government agency collateralized mortgage obligations [Member] Residential mortgage backed securities [Member]	Dec. 31, 2012 Government agency collateralized mortgage obligations [Member] Residential mortgage backed securities [Member]	Sep. 30, 2012 Government agency collateralized mortgage obligations [Member] Residential mortgage backed securities [Member]	Sep. 30, 2013 Government agency collateralized mortgage obligations [Member] Commercial mortgage backed securities [Member]	Dec. 31, 2012 Government agency collateralized mortgage obligations [Member] Commercial mortgage backed securities [Member]	Sep. 30, 2012 Government agency collateralized mortgage obligations [Member] Commercial mortgage backed securities [Member]
Amortized cost and fair value of securities available for sale
Amortized Cost, Available for Sale			$ 27,629	$ 28,612		$ 20,174	$ 22,079					$ 6,151	$ 2,169		$ 221,276	$ 139,699		$ 41,440	$ 41,981		$ 151,340	$ 115,647		$ 5,029	$ 5,091
Available for Sale Securities, Gross Unrealized Gain Accumulated in Investments			0		0	280		852	1,102		713	146		273	3,264		5,209	1,486		3,077	1,793		2,273	82		316
Available for Sale Securities, Gross Unrealized Loss Accumulated in Investments			(10,876)		(13,544)	(213)		(1)	0		0	(211)		0	(3,610)		(91)	(547)		0	(3,777)		(399)	0		0
Amortized Cost, Available for Sale									2,775	2,355
Amortized Cost, Available for Sale	475,814	357,633
Gross Unrealized Gains, Available for Sale	8,153	12,713
Gross Unrealized Losses, Available for Sale	(19,234)	(14,035)
Securities available for sale, at fair value	$ 464,733	$ 356,311	$ 16,753	$ 15,068		$ 20,241	$ 22,930		$ 3,877	$ 3,068		$ 6,086	$ 2,442		$ 220,930	$ 144,817		$ 42,379	$ 45,058		$ 149,356	$ 117,521		$ 5,111	$ 5,407