Fair Value (Assets And Liabilities Measured At Fair Value On A Recurring Basis) (Details) - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
Mar. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		$ 246,709,000	$ 159,956,000
Investments, Fair Value Disclosure		0
Mortgage loans held for sale		48,300,000	12,300,000
Mortgage IRLCs		2,900,000	221,000
Investment securities		1,032,814,000	1,209,701,000
Loans Held-for-sale, Fair Value Disclosure		48,265,000	12,278,000
Impaired Loan Fair Value		16,226,000	2,090,000
Other Assets, Fair Value Disclosure		7,168,180,000	6,426,869,000
Loans Receivable, Fair Value Disclosure		7,235,549,000	6,441,458,000
Time deposits		938,492,000	1,145,537,000
Other Liabilities, Fair Value Disclosure		5,374,000	1,273,000
Deposits, Fair Value Disclosure		943,866,000	1,146,810,000
Short Term Borrowings Fair Value		320,435,000	230,657,000
Long-term debt		142,849,000	200,726,000
Subordinated Debt Obligations, Fair Value Disclosure		180,209,000	14,372,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 575,000	1,026,000	575,000
Debt Securities, Available-for-sale		1,032,814,000	1,209,701,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		246,709,000	159,956,000
Mortgage IRLCs		0	0
Other Liabilities, Fair Value Disclosure		5,374,000	1,273,000
Deposits, Fair Value Disclosure		5,374,000	1,273,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		2,878,000	221,000
Investment securities		1,032,814,000	1,209,701,000
Loans Held-for-sale, Fair Value Disclosure		48,265,000	12,278,000
Loans Receivable, Fair Value Disclosure		51,143,000	12,499,000
Time deposits		938,492,000	1,145,537,000
Deposits, Fair Value Disclosure		938,492,000	1,145,537,000
Short Term Borrowings Fair Value		320,435,000	230,657,000
Long-term debt		142,849,000	200,726,000
Subordinated Debt Obligations, Fair Value Disclosure		180,209,000	14,372,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		0	0
Impaired Loan Fair Value		16,226,000	2,090,000
Other Assets, Fair Value Disclosure		7,168,180,000	6,426,869,000
Loans Receivable, Fair Value Disclosure		7,184,406,000	6,428,959,000
Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale		48,265,000	12,278,000
Mortgage IRLCs		2,878,000	221,000
Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage loans held for sale		48,265,000	12,278,000
Mortgage IRLCs		2,878,000	221,000
US States and Political Subdivisions Debt Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Debt Securities, Available-for-sale		304,506,000	320,491,000
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		304,506,000	320,491,000
US States and Political Subdivisions Debt Securities [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		304,506,000	320,491,000
U S Government Sponsored Entities Asset Backed Securities [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		726,297,000	889,210,000
U S Government Sponsored Entities Asset Backed Securities [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		726,297,000	889,210,000
Loans Receivable [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		4,503,000	1,870,000
Loans Receivable [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		0	0
Loans Receivable [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		4,503,000	1,870,000
Swap		4,503,000	1,870,000
Loans Receivable [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		0	0
Loans Receivable [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		4,503,000	1,870,000
Swap		4,503,000	1,870,000
Loans Receivable [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		4,503,000	1,870,000
Swap		4,503,000	1,870,000
Equity Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities		2,042,000	1,993,000
Equity Securities [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities		1,558,000	1,537,000
Equity Securities [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities		484,000	456,000
Equity Securities [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		2,042,000	1,993,000
Equity Securities [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		1,558,000	1,537,000
Equity Securities [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		484,000	456,000
Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		226,000	226,000
Swap [Member] \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	$ 575,000	1,026,000	575,000
Swap [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		226,000	226,000
Swap [Member] \| Fair Value, Recurring [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		226,000	226,000
Swap [Member] \| Fair Value, Recurring [Member] \| Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		226,000	226,000
Corporate Debt Securities
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		2,011,000
Debt Securities, Available-for-sale		2,011,000
Corporate Debt Securities \| Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investments, Fair Value Disclosure		2,011,000
Reported Value Measurement [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure		246,709,000	159,956,000
Mortgage IRLCs		2,878,000	221,000
Investment securities		1,032,814,000	1,209,701,000
Loans Held-for-sale, Fair Value Disclosure		48,265,000	12,278,000
Impaired Loan Fair Value		16,226,000	2,090,000
Other Assets, Fair Value Disclosure		7,124,139,000	6,430,136,000
Loans Receivable, Fair Value Disclosure		7,191,508,000	6,444,725,000
Time deposits		931,201,000	1,139,131,000
Other Liabilities, Fair Value Disclosure		5,374,000	1,273,000
Deposits, Fair Value Disclosure		936,575,000	1,140,404,000
Short Term Borrowings Fair Value		320,435,000	230,657,000
Long-term debt		135,000,000	192,500,000
Subordinated Debt Obligations, Fair Value Disclosure		187,668,000	15,000,000
Reported Value Measurement [Member] \| Loans Receivable [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Mortgage IRLCs		4,503,000	1,870,000
Swap		4,503,000	1,870,000
Reported Value Measurement [Member] \| Equity Securities [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Investment securities		2,042,000	1,993,000
Reported Value Measurement [Member] \| Swap [Member]
Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]
Swap		$ 226,000	$ 226,000

Fair Value, Assets And Liabilities Measured On Recurring Basis [Line Items]

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Impaired Loan Fair Value

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Short Term Borrowings Fair Value

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Time Deposits Fair Value

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- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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- Definition

Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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- Definition

Fair value portion of deposit liabilities held by the entity, including, but not limited to, foreign and domestic, interest and noninterest bearing, demand deposits, saving deposits, negotiable orders of withdrawal (NOW) and time deposits.

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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- Definition

Fair value of subordinated debt obligations including, but not limited to, subordinated loan, subordinated bond, subordinated debenture or junior debt.

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- Definition

Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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

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No definition available.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Fair value portion of mortgage loans held-for-sale.

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Fair value portion of other assets.

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Fair value portion of other liabilities.

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- Definition

Amount of unrealized gain (loss) related to derivatives designated as cash flow hedging instruments, recorded in results of operations to the extent that the cash flow hedge is determined to be ineffective.

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