Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 13
-Sentence Column B

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- Definition

Nominal or face amount used to calculate payments on the derivative asset.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

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- Definition

Fair value, after offset of derivative liability, of 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, before offset against an obligation to return collateral under a master netting arrangement. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

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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No definition available.

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- Definition

The number of derivative instruments of a particular group held by the entity.

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- Definition

Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

The estimated net amount of unrealized gains or losses on interest rate cash flow hedges as of the balance sheet date expected to be reclassified to earnings within the next twelve months.

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- Definition

Amount of loan with fixed rate of interest.

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-Name Accounting Standards Codification
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-SubTopic 10
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Loans Receivable Fixed Interest Rate

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Loans Receivable with Fixed Rates of Interest, Pool, Maturity Period

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Underlying Derivative at Fair Value

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Derivative Instruments and Hedging Activities - Narrative (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) instrument	Dec. 31, 2014 USD ($)	Dec. 31, 2018 USD ($)
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period		10 years
Loans receivable with fixed rates		$ 29,100,000
Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	$ 18,009,000		$ 18,422,000
Derivative Assets	0		189,000
Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	264,881,000		167,549,000
Derivative Assets	$ 798,000		490,000
Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period	15 years
Derivative fixed interest rate	7.43%
Notional Amount	$ 361,000		418,000
Loans receivable fixed interest rate (percentage)	7.43%
Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	$ 186,688,000		122,410,000
Derivative number of instruments held \| instrument	28
Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member] \| Other Liabilities [Member]
Derivative [Line Items]
Underlying derivative at fair value	$ 160,000
Cash Flow Hedging [Member] \| Interest Rate Swap [Member]
Derivative [Line Items]
Derivative asset notional amount		$ 20,000,000.0
Derivative fixed interest rate		2.10%
Interest rate cash flow hedge gain (loss) to be reclassified during next 12 months	21,000
Cash Flow Hedging [Member] \| Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	16,685,000		17,076,000
Cash Flow Hedging [Member] \| Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member] \| Other Liabilities [Member]
Derivative [Line Items]
Derivative Assets	$ 254,000
Fair Value Hedging [Member] \| Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Loans receivable with fixed rates of interest maturity period	10 years
Derivative fixed interest rate	5.83%
Notional Amount	$ 1,324,000		$ 1,346,000
Loans receivable fixed interest rate (percentage)	5.83%
Minimum [Member] \| Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative remaining maturity	1 year
Maximum [Member] \| Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative remaining maturity	10 years
One-Month LIBOR [Member] \| Interest Rate Swap [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative basis spread on variable rate	2.24%
One-Month LIBOR [Member] \| Fair Value Hedging [Member] \| Interest Rate Swap [Member] \| Designated as Hedging Instrument [Member]
Derivative [Line Items]
Derivative basis spread on variable rate	3.50%
Paying [Member] \| Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	$ 119,700,000
Receiving [Member] \| Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amount	67,000,000.0
Customer [Member] \| Credit Risk Contract [Member] \| Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Underlying derivative at fair value	$ 8,200,000