Investments (Details 3) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012 Securities	Dec. 31, 2011 Securities
Securities in a continuous unrealized loss position for greater than 12 months
Number of Securities	1	4
Fair Value	$ 200	$ 2,951
Gross Unrealized Losses	(94)	(202)
Less than or equal to 10% [Member]
Securities in a continuous unrealized loss position for greater than 12 months
Number of Securities		3
Fair Value		2,760
Gross Unrealized Losses		(92)
Greater than 10% [Member]
Securities in a continuous unrealized loss position for greater than 12 months
Number of Securities	1	1
Fair Value	200	191
Gross Unrealized Losses	$ (94)	$ (110)