Fair Value Measurements (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Reconciliation for assets and liabilities measured at fair value on a recurring basis
Beginning Balance	$ 15,960	$ 15,462	$ 15,068	$ 15,022
Realized gains (losses) included in net income	0	0	0	14
Unrealized gains (losses) included in other comprehensive income	(875)	2,913	2,669	4,291
Reclassification adjustment		0		(952)
Purchases	0	0	0	0
Sales	0	0	0	0
Issues	0	0	0	0
Settlements	(82)	0	0	0
Transfers into Level 3	0	0	984	0
Transfers out of Level 3	0	(3,033)	0	(3,033)
Ending Balance	16,753	15,342	16,753	15,342
Trust preferred securities [Member]
Reconciliation for assets and liabilities measured at fair value on a recurring basis
Beginning Balance	15,960	12,672	15,068	12,785
Realized gains (losses) included in net income	0	0	0	0
Unrealized gains (losses) included in other comprehensive income	(875)	2,670	2,669	3,509
Reclassification adjustment		0		(952)
Purchases	0	0	0	0
Sales	0	0	0	0
Issues	0	0	0	0
Settlements	(82)	0	0	0
Transfers into Level 3	0	0	984	0
Transfers out of Level 3	0	0	0	0
Ending Balance	16,753	15,342	16,753	15,342
Equity Securities [Member]
Reconciliation for assets and liabilities measured at fair value on a recurring basis
Beginning Balance	0	2,790	0	2,237
Realized gains (losses) included in net income	0	0	0	14
Unrealized gains (losses) included in other comprehensive income	0	243	0	782
Reclassification adjustment		0		0
Purchases	0	0	0	0
Sales	0	0	0	0
Issues	0	0	0	0
Settlements	0	0	0	0
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	(3,033)	0	(3,033)
Ending Balance	$ 0	$ 0	$ 0	$ 0