Fair Value Measurements - (Details 1) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reconciliation for assets and liabilities measured at fair value on a recurring basis
Beginning Balance	$ 19,127	$ 18,309	$ 19,756	$ 17,671
Accretion included in net income	8	0	(70)	16
Unrealized gains included in other comprehensive income	(200)	1,896	822	2,695
Reclassification adjustment		0		0
Purchases	0	0	0	0
Sales	0	0	(1,117)	0
Issues	0	0	0	0
Settlements	(45)	(632)	(501)	(809)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	18,890	19,573	18,890	19,573
Trust preferred securities
Reconciliation for assets and liabilities measured at fair value on a recurring basis
Beginning Balance	19,127	18,309	19,756	17,671
Accretion included in net income	8	0	(70)	16
Unrealized gains included in other comprehensive income	(200)	1,896	822	2,695
Reclassification adjustment		0		0
Purchases	0	0	0	0
Sales	0	0	(1,117)	0
Issues	0	0	0	0
Settlements	(45)	(632)	(501)	(809)
Transfers into Level 3	0	0	0	0
Transfers out of Level 3	0	0	0	0
Ending Balance	$ 18,890	$ 19,573	$ 18,890	$ 19,573