Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Restricted Cash	$ 1,000,000	$ 5,000,000
Deferred Loan Costs	5,400,000	3,300,000
Individual review of impairment of unpaid principal balances in excess of	1,000,000
Annual review of loan relationships in excess of	1,000,000
Unamortized Amount of Investments in Affordable Housing Limited Partnerships	5,000,000	$ 3,000
Other Real Estate Owned	$ 700,000
Statutory tax rate at which other comprehensive income and weighted-average rate of investment securities are calculated	35.00%
Federal income tax rate	35.00%	34.10%	35.00%
Minimum
Estimated lives	7 years
Maximum
Estimated lives	10 years