Fair Value of Financial Instruments (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($) security	Dec. 31, 2014 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	$ 187,626	$ 231,745
Available-for-sale Securities	$ 185,519	221,117
Collateralized Debt Obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquired Trust Preferred Securities, Number of Securities | security	16
Amortized Cost	$ 35,636	37,117
Available-for-sale Securities	$ 31,928	$ 25,339