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)
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-Article 12
-Section 13
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The aggregate fair value of assets needed to immediately settle the derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

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The effective portion of loss reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

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The net gain (loss) during the reporting period due to ineffectiveness in interest rate cash flow hedges. Recognized in earnings.

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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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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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Number of interest rate derivative instruments held by the entity at the reporting date.

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Amount before tax 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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Derivative Instruments (Details) $ in Thousands	3 Months Ended		9 Months Ended
Derivative Instruments (Details) $ in Thousands	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)	Apr. 01, 2018	Dec. 31, 2017 USD ($)
Interest Rate Derivatives [Abstract]
Number of interest rate swaps	2		2
Fair value	$ 700		$ 700			$ 2,200
Aggregate notional amount	67,400		67,400			$ 96,200
Reclassification during next 12 months	600		600
Termination value	700		700
Interest Rate Swap [Member] \| Other Comprehensive Income (Loss) [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of gain (loss) related to the effective portion recognized in other comprehensive (loss) income	69	$ 19	619	$ (7)
Interest Rate Swap [Member] \| Interest Expense [Member] \| Designated as Hedging Instrument [Member] \| Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Amount of loss related to the effective portion subsequently reclassified to interest expense	(66)	(75)	(127)	(391)
Amount of (loss) gain related to the ineffective portion recognized in interest expense	$ 0	$ (8)	$ (27)	$ 5
Debt Repayment [Member]
Interest Rate Derivatives [Abstract]
Number of interest rate swaps					1