Fair value, after the effects of master netting arrangements, of a 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, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fixed interest rate that will be received or paid upon exercise of the interest rate swaption contract.

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Percentage derived by dividing the change in value of a hedging instrument by the change in the value of the hedged item.

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Number of foreign currency exchange rate derivatives held by the entity at the reporting date.

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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 - Derivatives Designated as Hedging Instruments Narrative (Details) € in Thousands		1 Months Ended	3 Months Ended		9 Months Ended
	Aug. 21, 2018 USD ($)	Apr. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 derivative_instrument	May 31, 2017 USD ($) swap
Derivatives, Fair Value [Line Items]
Fair value of derivative assets			$ 0		$ 0		$ 3,259,000
Interest rate swaps
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income on the ineffective portion of derivative instruments designated as cash flow hedging			0		(11,818,000)
Net investment cross currency swaps
Derivatives, Fair Value [Line Items]
Gain or (loss) recognized in income on the ineffective portion of derivative instruments designated as hedging			0		3,868,000
Derivatives designated as hedging instruments: \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Gain (loss) recognized in income on the ineffective portion of derivative instruments designated as cash flow hedging				$ 0
Derivatives designated as hedging instruments: \| Net investment cross currency swaps
Derivatives, Fair Value [Line Items]
Fair value of derivative assets			$ 0		$ 0		$ 3,259,000
Derivatives designated as hedging instruments: \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Cash received at settlement	$ 14,117,000
Derivatives designated as hedging instruments: \| Cash Flow Hedging \| Interest rate swaps
Derivatives, Fair Value [Line Items]
Number of interest rate derivatives held (derivative instrument) \| swap									4
Cash flow effectiveness percent				100.00%
Derivatives designated as hedging instruments: \| Cash Flow Hedging \| Interest rate swap,Instrument One
Derivatives, Fair Value [Line Items]
Derivative notional amount									$ 100,000,000
Derivatives designated as hedging instruments: \| Cash Flow Hedging \| Interest rate swap, Instrument Two
Derivatives, Fair Value [Line Items]
Derivative notional amount									100,000,000
Derivatives designated as hedging instruments: \| Cash Flow Hedging \| Interest rate swap, Instrument Three
Derivatives, Fair Value [Line Items]
Derivative notional amount									200,000,000
Derivatives designated as hedging instruments: \| Cash Flow Hedging \| Interest rate swap, Instrument Four
Derivatives, Fair Value [Line Items]
Derivative notional amount									$ 300,000,000
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Net investment cross currency swaps
Derivatives, Fair Value [Line Items]
Cash flow effectiveness percent			100.00%		100.00%	100.00%
Number of currency derivatives held (derivative instrument) \| derivative_instrument								2
Gain or (loss) recognized in income on the ineffective portion of derivative instruments designated as hedging					$ 0
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument One
Derivatives, Fair Value [Line Items]
Derivative notional amount			$ 59,210,000		$ 59,210,000	€ 50,000
Cash received at settlement		$ 7,679,000
Implied exchange rate			1.1842		1.1842	1.1842
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument One \| EUR
Derivatives, Fair Value [Line Items]
Swaption interest rate			5.63%		5.63%	5.63%
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument One \| USD
Derivatives, Fair Value [Line Items]
Swaption interest rate			8.25%		8.25%	8.25%
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument Two
Derivatives, Fair Value [Line Items]
Derivative notional amount			$ 59,360,000		$ 59,360,000	€ 50,000
Implied exchange rate			1.1872		1.1872	1.1872
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument Two \| EUR
Derivatives, Fair Value [Line Items]
Swaption interest rate			5.6675%		5.6675%	5.6675%
Derivatives designated as hedging instruments: \| Net Investment Hedging \| Cross currency interest rate contract, Instrument Two \| USD
Derivatives, Fair Value [Line Items]
Swaption interest rate			8.25%		8.25%	8.25%
Interest expense \| Derivatives designated as hedging instruments: \| Cash Flow Hedging
Derivatives, Fair Value [Line Items]
Derivatives gain				$ 9,800,000