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Securities (Details Textual) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Debt Securities, Available-for-sale, Realized Gain	$ 16
Gain on sale of investments	(16)	$ (2)	$ (12)	$ (2)
Gross unrealized losses	2,010		2,010			$ 15,214
Cumulative OTTI charges	2,974	$ 2,974	2,974	$ 2,974	$ 2,974	2,974	$ 7,132	$ 7,132
Amortized Cost	775,568		775,568			793,084
Securities available-for-sale	$ 791,537		$ 791,537			$ 784,916
Minimum [Member]
Debt Securities, Available-for-sale [Line Items]
Basis point spread on variable rate	1.60%		1.60%
Minimum [Member] | Standard Poors [Member]
Debt Securities, Available-for-sale [Line Items]
Credit Quality Indicator Pricing	83.32		83.32
Minimum [Member] | Moody Investor Service [Member]
Debt Securities, Available-for-sale [Line Items]
Credit Quality Indicator Pricing	19.62		19.62
Maximum [Member]
Debt Securities, Available-for-sale [Line Items]
Basis point spread on variable rate	1.80%		1.80%

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- Definition

Available for Sale Securities, Basis Point Spread on Variable Rate

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Rate of credit quality indicator pricing.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

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Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Amount of unrealized and realized gain (loss) on investment in debt and equity securities.

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-Topic 220
-SubTopic 10
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Amount of realized gain 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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The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

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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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