Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Amortized cost and fair value of securities available for sale
Amortized Cost	$ 550,466	$ 513,594
Gross Unrealized Gains	8,726	7,701
Gross Unrealized Losses	(13,569)	(20,041)
Securities available for sale	545,623	501,254
Trust preferred securities
Amortized cost and fair value of securities available for sale
Amortized Cost	26,738	27,531
Gross Unrealized Gains	142	73
Gross Unrealized Losses	(7,307)	(9,933)
Securities available for sale	19,573	17,671
Other debt securities
Amortized cost and fair value of securities available for sale
Amortized Cost	18,044	19,544
Gross Unrealized Gains	451	240
Gross Unrealized Losses	(106)	(230)
Securities available for sale	18,389	19,554
Other equity securities
Amortized cost and fair value of securities available for sale
Amortized Cost	2,331	2,775
Gross Unrealized Gains	1,148	1,542
Gross Unrealized Losses	0	0
Securities available for sale	3,479	4,317
Obligations of other U.S. Government agencies and corporations
Amortized cost and fair value of securities available for sale
Amortized Cost	6,126	6,144
Gross Unrealized Gains	150	125
Gross Unrealized Losses	(163)	(201)
Securities available for sale	6,113	6,068
Government agency mortgage backed securities | Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	289,008	261,659
Gross Unrealized Gains	3,718	2,747
Gross Unrealized Losses	(2,042)	(4,414)
Securities available for sale	290,684	259,992
Government agency mortgage backed securities | Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	45,938	41,252
Gross Unrealized Gains	1,457	1,373
Gross Unrealized Losses	(308)	(584)
Securities available for sale	47,087	42,041
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	157,135	149,682
Gross Unrealized Gains	1,480	1,542
Gross Unrealized Losses	(3,643)	(4,679)
Securities available for sale	154,972	146,545
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	5,146	5,007
Gross Unrealized Gains	180	59
Gross Unrealized Losses	0	0
Securities available for sale	$ 5,326	$ 5,066