For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of hedged item in hedging relationship. Excludes hedged asset or liability.

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Fair value, before 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 elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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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 estimated value of gains (losses), net anticipated to be transferred in the future from accumulated other comprehensive income into earnings.

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Nominal or face amount used to calculate payment on derivative.

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Derivative and Hedging Instruments - Narrative (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2019	Dec. 31, 2018	Nov. 30, 2018	Nov. 06, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Derivative loss reclassification from AOCI to income	$ 400,000
Customer Concentration Risk \| Accounts Receivable \| One Customer
Derivative Instruments, Gain (Loss) [Line Items]
Concentration risk percentage	13.00%	22.00%
Interest Rate Swap
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, notional amount			$ 50,000,000	$ 50,000,000
Derivative liability, fair value			$ 0	$ 0
Derivative, amount of hedged item	$ 50,000,000