Junior Subordinated Debentures (Narrative) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2018	Mar. 31, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized losses arising during the period	$ (2,409)		$ 0	$ (5,605)	$ 0
Common stock issued by Trusts	14,000			14,000		$ 14,300
Debt Instruments Redemption, Principal, Interest & Fees		$ 10,600
Loss on junior subordinated debentures carried at fair value	0		$ 1,590	0	$ 4,717
Accounting Standards Update 2016-01 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Unrealized losses arising during the period	$ (2,400)			$ (5,600)