Fair Value of Financial Instruments (Narrative) (Details) $ in Thousands	3 Months Ended
	Jun. 30, 2016 USD ($) security	Dec. 31, 2015 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Amortized Cost	$ 149,793	$ 173,549
Available-for-sale Securities	$ 147,227	170,232
Collateralized debt obligations [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquired Trust Preferred Securities, Number of Securities | security	12
Amortized Cost	$ 25,402	25,766
Available-for-sale Securities	$ 20,230	$ 22,211