Securities (Details 3) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 Holdings	Dec. 31, 2011 Holdings
Summary of gross unrealized losses and fair value of investments
No of holdings	36	4
Fair value, less than 12 months	$ 7,111
Unrealized losses, less than 12 months	(95)
Fair value, 12 months or longer	7,039	10,734
Unrealized losses, 12 months or longer	(2,615)	(3,977)
Fair value, Total	14,150	10,734
Unrealized losses, Total	(2,710)	(3,977)
SINGLE ISSUER TRUST PREFERRED SECURITIES ISSUED BY BANKS AND INSURERS [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings	1	2
Fair value, less than 12 months
Unrealized losses, less than 12 months
Fair value, 12 months or longer	5,000	8,617
Unrealized losses, 12 months or longer	(38)	(1,459)
Fair value, Total	5,000	8,617
Unrealized losses, Total	(38)	(1,459)
POOLED TRUST PREFERRED SECURITIES ISSUED BY BANKS AND INSURERS [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings	2	2
Fair value, less than 12 months
Unrealized losses, less than 12 months
Fair value, 12 months or longer	2,039	2,117
Unrealized losses, 12 months or longer	(2,577)	(2,518)
Fair value, Total	2,039	2,117
Unrealized losses, Total	(2,577)	(2,518)
MARKETABLE EQUITY SECURITIES [Member]
Summary of gross unrealized losses and fair value of investments
No of holdings	33
Fair value, less than 12 months	7,111
Unrealized losses, less than 12 months	(95)
Fair value, 12 months or longer
Unrealized losses, 12 months or longer
Fair value, Total	7,111
Unrealized losses, Total	$ (95)