Shareholders' Equity (Schedule of Consolidated and Affiliate Bank Actual Capital and Minimum Required Levels) (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
		Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Bank
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer					0.00%
Actual Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer			1.875%	1.25%
Total Capital (to Risk Weighted Assets)
Actual Amount of Total Capital (to Risk Weighted Assets)			$ 381,294	$ 305,773
Actual Ratio of Total Capital (to Risk Weighted Assets)			12.37%	12.29%
Minimum Required For Capital Adequacy Purposes: Amount, Total Capital			$ 246,594	$ 199,093
Minimum Required For Capital Adequacy Purposes: Ratio, Total Capital (to Risk Weighted Assets)	[1]		8.00%	8.00%
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Total Capital (to Risk Weighted Assets)			$ 308,242	$ 248,866
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Total Capital (to Risk Weighted Assets)			10.00%	10.00%
Tier 1 (Core) Capital (to Risk Weighted Assets)
Actual Amount of Tier 1 Capital (to Risk Weighted Assets)			$ 365,471	$ 290,079
Actual Ratio of Tier 1 Capital (to Risk Weighted Assets)			11.86%	11.66%
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Risk Weighted Assets)			$ 184,945	$ 149,320
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Risk Weighted Assets)	[1]		6.00%	6.00%
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Tier 1 Capital (to Risk Weighted Assets)			$ 246,594	$ 199,093
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Tier 1 Capital (to Risk Weighted Assets)			8.00%	8.00%
Common Equity Tier 1 (CET 1) Capital Ratio (to Risk Weighted Assets)
Actual Amount of Common Tier 1 Capital (to Risk Weighted Assets)			$ 365,471	$ 290,079
Actual Ratio of Common Tier 1 Capital (to Risk Weighted Assets)			11.86%	11.66%
Minimum Required For Capital Adequacy Purposes: Amount, Common Tier 1 Capital (to Risk Weighted Assets)			$ 138,709	$ 111,990
Minimum Required For Capital Adequacy Purposes: Ratio, Common Tier 1 Capital (to Risk Weighted Assets)	[1]		4.50%	4.50%
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Common Tier 1 Capital (to Risk Weighted Assets)			$ 200,357	$ 161,763
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Common Tier 1 Capital (to Risk Weighted Assets)			6.50%	6.50%
Tier 1 (Core) Capital (to Average Assets)
Actual Amount of Tier 1 Capital (to Average Assets)			$ 365,471	$ 290,079
Actual Ratio of Tier 1 Capital (to Average Assets)			9.78%	9.63%
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Average Assets)			$ 149,484	$ 120,509
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Average Assets)	[1]		4.00%	4.00%
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Amount, Tier 1 Capital (to Average Assets)			$ 186,854	$ 150,637
Minimum Required To Be Well-Capitalized Under Prompt Corrective Action Regulations: Ratio, Tier 1 Capital (to Average Assets)			5.00%	5.00%
Bank | Scenario, Forecast
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer		2.50%
Consolidated
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Minimum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer					0.00%
Actual Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer			1.875%	1.25%
Total Capital (to Risk Weighted Assets)
Actual Amount of Total Capital (to Risk Weighted Assets)			$ 381,385	$ 339,391
Actual Ratio of Total Capital (to Risk Weighted Assets)			12.36%	13.62%
Minimum Required For Capital Adequacy Purposes: Amount, Total Capital			$ 246,805	$ 199,363
Minimum Required For Capital Adequacy Purposes: Ratio, Total Capital (to Risk Weighted Assets)	[1]		8.00%	8.00%
Tier 1 (Core) Capital (to Risk Weighted Assets)
Actual Amount of Tier 1 Capital (to Risk Weighted Assets)			$ 365,562	$ 323,697
Actual Ratio of Tier 1 Capital (to Risk Weighted Assets)			11.85%	12.99%
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Risk Weighted Assets)			$ 185,104	$ 149,522
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Risk Weighted Assets)	[1]		6.00%	6.00%
Common Equity Tier 1 (CET 1) Capital Ratio (to Risk Weighted Assets)
Actual Amount of Common Tier 1 Capital (to Risk Weighted Assets)			$ 354,251	$ 312,637
Actual Ratio of Common Tier 1 Capital (to Risk Weighted Assets)			11.48%	12.55%
Minimum Required For Capital Adequacy Purposes: Amount, Common Tier 1 Capital (to Risk Weighted Assets)			$ 138,828	$ 112,142
Minimum Required For Capital Adequacy Purposes: Ratio, Common Tier 1 Capital (to Risk Weighted Assets)	[1]		4.50%	4.50%
Tier 1 (Core) Capital (to Average Assets)
Actual Amount of Tier 1 Capital (to Average Assets)			$ 365,562	$ 323,697
Actual Ratio of Tier 1 Capital (to Average Assets)			9.75%	10.71%
Minimum Required For Capital Adequacy Purposes: Amount, Tier 1 Capital (to Average Assets)			$ 149,917	$ 120,862
Minimum Required For Capital Adequacy Purposes: Ratio, Tier 1 Capital (to Average Assets)	[1]		4.00%	4.00%
Consolidated | Scenario, Forecast
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]
Maximum Capital Required for Capital Adequacy Ratio, Capital Conservation Buffer		2.50%

[1] Excludes capital conservation buffer.