Loans (Schedule of Loans Individually Evaluated for Impairment) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Financing Receivable, Impaired [Line Items]
Recorded Investment	$ 41,670	$ 43,356
Unpaid Principal Balance	41,686	43,607
Related Allowance	1,476	2,142
Average Impaired Balance	41,258	37,972
Interest Income Recognized while impaired	2,027	1,680
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	5,371	1,019
Without a related allowance, Unpaid Principal Balance	5,371	1,253
Without a related allowance, Average Impaired Balance	5,371	321
Without a related allowance, Interest Income Recognized while impaired	345	16
With a related allowance, Recorded Investment	80	3,343
With a related allowance, Unpaid Principal Balance	80	3,342
With a related allowance, Related Allowance	22	682
With a related allowance, Average Impaired Balance	80	705
With a related allowance, Interest Income Recognized while impaired	0	39
Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	8,896	8,600
Without a related allowance, Unpaid Principal Balance	8,902	8,605
Without a related allowance, Average Impaired Balance	8,774	7,730
Without a related allowance, Interest Income Recognized while impaired	376	318
With a related allowance, Recorded Investment	2,933	2,969
With a related allowance, Unpaid Principal Balance	2,932	2,969
With a related allowance, Related Allowance	447	462
With a related allowance, Average Impaired Balance	2,933	2,397
With a related allowance, Interest Income Recognized while impaired	114	117
Non-Owner Occupied [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	10,083	9,666
Without a related allowance, Unpaid Principal Balance	10,090	9,673
Without a related allowance, Average Impaired Balance	9,919	9,753
Without a related allowance, Interest Income Recognized while impaired	505	493
With a related allowance, Recorded Investment	0	189
With a related allowance, Unpaid Principal Balance	0	191
With a related allowance, Related Allowance	0	9
With a related allowance, Average Impaired Balance	0	226
With a related allowance, Interest Income Recognized while impaired	0	16
Land and Land Improvements [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	1,583	4,767
Without a related allowance, Unpaid Principal Balance	1,583	4,767
Without a related allowance, Average Impaired Balance	1,583	4,947
Without a related allowance, Interest Income Recognized while impaired	92	102
With a related allowance, Recorded Investment	1,046	1,057
With a related allowance, Unpaid Principal Balance	1,046	1,057
With a related allowance, Related Allowance	288	298
With a related allowance, Average Impaired Balance	1,046	1,073
With a related allowance, Interest Income Recognized while impaired	58	56
Construction [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	0	0
Without a related allowance, Unpaid Principal Balance	0	0
Without a related allowance, Average Impaired Balance	0	0
Without a related allowance, Interest Income Recognized while impaired	0	0
With a related allowance, Recorded Investment	0	0
With a related allowance, Unpaid Principal Balance	0	0
With a related allowance, Related Allowance	0	0
With a related allowance, Average Impaired Balance	0	0
With a related allowance, Interest Income Recognized while impaired	0	0
Non-Jumbo [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	3,396	3,279
Without a related allowance, Unpaid Principal Balance	3,402	3,284
Without a related allowance, Average Impaired Balance	3,349	3,401
Without a related allowance, Interest Income Recognized while impaired	166	180
With a related allowance, Recorded Investment	2,854	2,982
With a related allowance, Unpaid Principal Balance	2,853	2,981
With a related allowance, Related Allowance	615	585
With a related allowance, Average Impaired Balance	2,785	2,539
With a related allowance, Interest Income Recognized while impaired	101	98
Jumbo [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	4,066	4,132
Without a related allowance, Unpaid Principal Balance	4,065	4,130
Without a related allowance, Average Impaired Balance	4,066	3,517
Without a related allowance, Interest Income Recognized while impaired	191	166
With a related allowance, Recorded Investment	817	821
With a related allowance, Unpaid Principal Balance	817	822
With a related allowance, Related Allowance	104	106
With a related allowance, Average Impaired Balance	817	827
With a related allowance, Interest Income Recognized while impaired	47	48
Home Equity [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	523	523
Without a related allowance, Unpaid Principal Balance	523	523
Without a related allowance, Average Impaired Balance	523	523
Without a related allowance, Interest Income Recognized while impaired	31	30
With a related allowance, Recorded Investment	0	0
With a related allowance, Unpaid Principal Balance	0	0
With a related allowance, Related Allowance	0	0
With a related allowance, Average Impaired Balance	0	0
With a related allowance, Interest Income Recognized while impaired	0	0
Mortgage Warehouse Lines [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	0	0
Without a related allowance, Unpaid Principal Balance	0	0
Without a related allowance, Average Impaired Balance	0	0
Without a related allowance, Interest Income Recognized while impaired	0	0
With a related allowance, Recorded Investment	0	0
With a related allowance, Unpaid Principal Balance	0	0
With a related allowance, Related Allowance	0	0
With a related allowance, Average Impaired Balance	0	0
With a related allowance, Interest Income Recognized while impaired	0	0
Consumer Portfolio Segment [Member]
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	22	9
Without a related allowance, Unpaid Principal Balance	22	10
Without a related allowance, Average Impaired Balance	12	13
Without a related allowance, Interest Income Recognized while impaired	1	1
With a related allowance, Recorded Investment	0	0
With a related allowance, Unpaid Principal Balance	0	0
With a related allowance, Related Allowance	0	0
With a related allowance, Average Impaired Balance	0	0
With a related allowance, Interest Income Recognized while impaired	0	0
Total Without a Related Allowance
Financing Receivable, Impaired [Line Items]
Without a related allowance, Recorded Investment	33,940	31,995
Without a related allowance, Unpaid Principal Balance	33,958	32,245
Without a related allowance, Average Impaired Balance	33,597	30,205
Without a related allowance, Interest Income Recognized while impaired	1,707	1,306
Total With a Related Allowance
Financing Receivable, Impaired [Line Items]
With a related allowance, Recorded Investment	7,730	11,361
With a related allowance, Unpaid Principal Balance	7,728	11,362
With a related allowance, Related Allowance	1,476	2,142
With a related allowance, Average Impaired Balance	7,661	7,767
With a related allowance, Interest Income Recognized while impaired	320	374
Total Commercial
Financing Receivable, Impaired [Line Items]
Recorded Investment	29,992	31,610
Unpaid Principal Balance	30,004	31,857
Related Allowance	757	1,451
Average Impaired Balance	29,706	27,152
Interest Income Recognized while impaired	1,490	1,157
Total Residential Real Estate
Financing Receivable, Impaired [Line Items]
Recorded Investment	11,656	11,737
Unpaid Principal Balance	11,660	11,740
Related Allowance	719	691
Average Impaired Balance	11,540	10,807
Interest Income Recognized while impaired	536	522
Total Consumer
Financing Receivable, Impaired [Line Items]
Recorded Investment	22	9
Unpaid Principal Balance	22	10
Related Allowance	0	0
Average Impaired Balance	12	13
Interest Income Recognized while impaired	$ 1	$ 1