Securities (Details 1) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Amortized cost and fair value of securities available for sale
Amortized Cost	$ 574,917	$ 513,594
Gross Unrealized Gains	9,700	7,701
Gross Unrealized Losses	(15,569)	(20,041)
Securities available for sale	569,048	501,254
Trust preferred securities
Amortized cost and fair value of securities available for sale
Amortized Cost	27,371	27,531
Gross Unrealized Gains	92	73
Gross Unrealized Losses	(9,154)	(9,933)
Securities available for sale	18,309	17,671
Other debt securities
Amortized cost and fair value of securities available for sale
Amortized Cost	18,482	19,544
Gross Unrealized Gains	343	240
Gross Unrealized Losses	(124)	(230)
Securities available for sale	18,701	19,554
Other equity securities
Amortized cost and fair value of securities available for sale
Amortized Cost	3,054	2,775
Gross Unrealized Gains	1,404	1,542
Gross Unrealized Losses	0	0
Securities available for sale	4,458	4,317
Obligations of other U.S. Government agencies and corporations
Amortized cost and fair value of securities available for sale
Amortized Cost	6,132	6,144
Gross Unrealized Gains	148	125
Gross Unrealized Losses	(158)	(201)
Securities available for sale	6,122	6,068
Government agency mortgage backed securities | Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	303,203	261,659
Gross Unrealized Gains	4,361	2,747
Gross Unrealized Losses	(1,896)	(4,414)
Securities available for sale	305,668	259,992
Government agency mortgage backed securities | Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	46,154	41,252
Gross Unrealized Gains	1,576	1,373
Gross Unrealized Losses	(347)	(584)
Securities available for sale	47,383	42,041
Government agency collateralized mortgage obligations | Residential mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	165,265	149,682
Gross Unrealized Gains	1,571	1,542
Gross Unrealized Losses	(3,890)	(4,679)
Securities available for sale	162,946	146,545
Government agency collateralized mortgage obligations | Commercial mortgage backed securities:
Amortized cost and fair value of securities available for sale
Amortized Cost	5,256	5,007
Gross Unrealized Gains	205	59
Gross Unrealized Losses	0	0
Securities available for sale	$ 5,461	$ 5,066