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Discount Percentage Applied To Real Estate Appraised Values

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- Definition

expense related to other repossessed assets

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Impaired Financing Receivable, related expense

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Impaired Financing Receivable, Carrying Value

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- Definition

Impaired Loan Fair Value

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Mortgage Servicing Rights Fair Value

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Other Real Estate, Foreclosed Assets, and Repossessed Assets, Fair Value

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Partial Charge-Offs On Impaired Loans carried at Fair Value

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Percent of OREO held at fair value

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- Definition

Servicing Asset Recorded At Cost

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Fair value of investment other than investment in equity security, investment in debt security and equity method investment. Includes, but is not limited to, investment in certain entities that calculate net asset value per share. Example includes, but is not limited to, investment in hedge fund, venture capital fund, private equity fund, and real estate partnership or fund.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

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Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment.

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Amount of allowance for credit losses related to recorded investment.

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- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

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Value of input used to measure real estate owned by financial institution by financial institution which is not directly related to its business.

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Amortized amount of contract to service financial assets under which the benefits of servicing are expected to more than adequately compensate the servicer.

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Reflects the estimated amount of impairment as of the balance sheet date of recognized servicing assets that are being amortized in proportion to and over the period of estimated net servicing income or loss.

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Fair Value (Narrative) (Details)	3 Months Ended		12 Months Ended
Fair Value (Narrative) (Details)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
expense related to other repossessed assets		$ 0
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets				$ (995,000)
Loans Held-for-sale, Fair Value Disclosure	$ 4,276,000		$ 4,158,000
Impaired Financing Receivable, Carrying Value	$ 48,439,000		45,871,000
Discount percentage applied to real estate appraised values	15.00%
Discount percentage applied to lot development appraised values	6.00%
Partial Charge-Offs On Impaired Loans	$ 10,957,000		11,246,000
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	2,468,000		2,273,000
Impaired Financing Receivable, Related Allowance	2,468,000		2,273,000
Impaired Loan Fair Value	5,462,000		6,399,000
Partial Charge-Offs On Impaired Loans carried at Fair Value	3,341,000		3,630,000
Book Value Of Impaired Loans Carried At Fair Value	5,527,000		6,503,000
Impaired Financing Receivable, carried at fair value, related expense	33,000	50,000
MSR recorded at lower of cost or fair value	10,082,000	9,969,000	10,178,000	9,688,000
Mortgage Servicing Rights Fair Value	1,800,000		1,200,000
Valuation allowance of MSR	289,000	325,000	232,000	630,000
MSRs recorded at cost	8,300,000		9,000,000.0
Changes due to fair value adjustments	(57,000)	305,000
Other Real Estate, Foreclosed Assets, and Repossessed Assets	$ 4,629,000		$ 4,303,000
Percent of OREO held at fair value	83.00%		85.00%
Other Real Estate, Foreclosed Assets, and Repossessed Assets, Fair Value	$ 3,800,000		$ 3,700,000
OREO valuation adjustments	27,000	207,000
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments	5,400,000		6,100,000
Alternative Investment, income recognized	1,600,000	$ (300,000)
Commercial Receivables, excluding Commercial, Financial, and Agricultural [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Financing Receivable, Related Allowance	65,000		104,000
Financing Receivable, not collateral dependent [Domain]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Financing Receivable, Related Allowance	2,403,000		2,169,000
Commercial Real Estate Portfolio Segment [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	58,000		86,000
Construction Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Financing Receivable, Allowance for Credit Losses, Individually Evaluated for Impairment	0		0
Other Real Estate, Foreclosed Assets, and Repossessed Assets	1,107,000		1,108,000
Residential Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate, Foreclosed Assets, and Repossessed Assets	983,000		836,000
Accounting Standards Update 2016-01 [Member] \| Retained Earnings [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets				$ 1,917,000
Fair Value Measured at Net Asset Value Per Share [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Alternative Investment	13,300,000		11,000,000.0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loan Fair Value	$ 5,462,000		$ 6,399,000
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	1.075		1.075
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.684		0.684
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Construction Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.607		0.900
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Construction Real Estate [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.450		0.450
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.264		0.400
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Maximum [Member] \| Residential Real Estate [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.546		0.546
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.341		0.311
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.284		0.347
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Construction Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.346		0.261
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Construction Real Estate [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.218		0.217
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.103		0.132
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Weighted Average [Member] \| Residential Real Estate [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.425		0.425
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
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Impaired Loans Receivable, Measurement Input	0.000		0.000
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.009		0.009
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Construction Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.017		0.050
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Construction Real Estate [Member] \| Real Estate [Member]
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Other Real Estate Owned, Measurement Input	0.000		0.000
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.010		0.000
Measurement Input, Comparability Adjustment [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Market Approach [Member] \| Minimum [Member] \| Residential Real Estate [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.304		0.304
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.108		0.108
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.130		0.130
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Maximum [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input			0.105
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Weighted Average [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.108		0.106
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Weighted Average [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.127		0.130
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Weighted Average [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input			0.105
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.108		0.095
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Real Estate [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Other Real Estate Owned, Measurement Input	0.100		0.130
Measurement Input, Cap Rate [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Income Approach [Member] \| Minimum [Member] \| Residential Real Estate [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input			0.105
Measurement input replacement cost [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Cost Approach [Member] \| Maximum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.901		0.901
Measurement input replacement cost [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Cost Approach [Member] \| Weighted Average [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.107		0.110
Measurement input replacement cost [Member] \| Fair Value, Inputs, Level 3 [Member] \| Valuation, Cost Approach [Member] \| Minimum [Member] \| Commercial Real Estate Portfolio Segment [Member] \| Loans Receivable [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Impaired Loans Receivable, Measurement Input	0.042		0.042