Shareholders' Equity (Narrative) (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2006	Dec. 31, 2018	Dec. 31, 2017
Equity Additional Information [Line Items]
Trust preferred securities included in Tier 1 Capital		$ 22,000	$ 21,998
Dividends:
Amount of additional dividends the bank could have declared		$ 233,000
Reserved Shares:
Reserved shares available for grant		1,804,163
2006 Stock Repurchase Plan [Member]
Stock Repurchase Program:
Authorized amount (in shares)	400,000
Authorized amount as a percentage of total common stock	3.00%
Cumulative amount of shares purchased		185,400
Shares repurchased, value		$ 4,800