Investment Securities (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012 security	Dec. 31, 2011	Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, aggregate loss	$ 2,307	$ 2,318
Securities pledged as collateral	218,739	211,988
U.S Government sponsored entities
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions for less than 12 months	13
Continuous unrealized loss position, aggregate loss	0	0
Collateralized mortgage backed securities
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions for less than 12 months	9
Continuous unrealized loss position, aggregate loss	0	0
Municipal bonds
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions for less than 12 months	20
Corporate debt securities
Schedule of Available-for-sale Securities [Line Items]
Securities in unrealized loss positions for less than 12 months	7
Securities in unrealized loss positions for more than 12 months	2
Securities in unrealized loss positions for more than 12 months, with improved loss positions	1
Continuous unrealized loss position, aggregate loss	21	104
Collateralized debt obligations
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, aggregate loss	2,282	2,318
Securities representing the majority of unrealized losses in the Investment Portfolio	5
Other than temporary impairment, credit-related losses charged against earnings	$ 4		$ 85