Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

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

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Amount, before tax and reclassification, of gain (loss) from derivative instrument designated and qualifying cash flow hedge included in assessment of hedge effectiveness.

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Derivative Instruments and Hedging Activities - Effect of Derivative Financial Instruments on Income Statement (Details) - Interest Rate Contracts - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Derivatives Designated as Hedging Instruments \| Interest expense
Derivative [Line Items]
Amount of Loss Reclassified from Other Comprehensive Income Into Income (Effective Portion)	$ (470)	$ (985)	$ (1,250)
Derivatives Designated as Hedging Instruments \| Cash Flow Hedging
Derivative [Line Items]
Amount of Gain (Loss) Recognized in Other Comprehensive Income on Derivative (Effective Portion)	247	13
Not Designated as Hedging Instruments \| Other income
Derivative [Line Items]
Amount of Gain (Loss) Recognized Income on Derivative			$ 211