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Accumulated Other Comprehensive Income (Accumulated Comprehensive Income, Net of Income Tax) (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss), net of income taxes	$ 6,230	$ 11,022
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated other comprehensive (loss), net of income taxes	6,230	11,022
Accumulated Other Than Temporary Impairment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized loss on securities available-for-sale which are not other-than-temporarily impaired	8,894	14,262
Income tax effect of unrealized loss on securities available-for-sale	(1,749)	(2,170)
Net unrealized gain on securities available for sale wich are not other than temporarily impaired	7,145	12,092
Accumulated Net Gain Loss From Designated Or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Unrealized (loss) gain on cash flow hedges	(1,464)	(1,711)
Income tax effect of unrealized (loss) gain on cash flow hedges	549	641
Net unrealized (loss) gain on cash flow hedges	$ (915)	$ (1,070)

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- Definition

Amount, after tax, of accumulated unrealized gain (loss) on 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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Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses.

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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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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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Amount before tax, after reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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