Fair Value (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013	Sep. 30, 2013	Dec. 31, 2012
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance	$ 14,679	$ 16,033	$ 16,007
Total realized/unrealized gains or losses - Included in earnings	0	0	(542)
Total realized/unrealized gains or losses - Included in other comprehensive income	(305)	2,499	1,556
Transfers	(1,187)	(1,187)
Purchases			1,186
Settlements	(1,139)	(5,297)	(2,174)
Ending balance	12,048	12,048	16,033
Equities
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance			1,711
Total realized/unrealized gains or losses - Included in earnings			(446)
Total realized/unrealized gains or losses - Included in other comprehensive income			0
Purchases			0
Settlements			(1,265)
Ending balance			0
State and Municipal Obligations
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance	6,502	9,911	9,525
Total realized/unrealized gains or losses - Included in earnings	0	0	0
Total realized/unrealized gains or losses - Included in other comprehensive income	0	0	0
Transfers	(1,187)	(1,187)
Purchases			1,186
Settlements	(790)	(4,199)	(800)
Ending balance	4,525	4,525	9,911
Collateralized Debt Obligations
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs
Beginning balance	8,177	6,122	4,771
Total realized/unrealized gains or losses - Included in earnings	0		(96)
Total realized/unrealized gains or losses - Included in other comprehensive income	(305)	2,499	1,556
Transfers	0	0
Purchases			0
Settlements	(349)	(1,098)	(109)
Ending balance	$ 7,523	$ 7,523	$ 6,122