Fair Value Fair Value Measurements and Disclosures - Financial Instruments Required to be Carried at Fair Value (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets:
Government bonds	$ 4,767	$ 5,052
Derivative contracts (recorded in other assets)	1,804	875
Liabilities:
Derivative contracts (recorded in other liabilities)	66,137	23,663
Level 1
Assets:
Derivative contracts (recorded in other assets)	0	0
Liabilities:
Derivative contracts (recorded in other liabilities)	0	0
Level 2
Assets:
Derivative contracts (recorded in other assets)	1,804	875
Liabilities:
Derivative contracts (recorded in other liabilities)	66,137	23,663
Level 3
Assets:
Derivative contracts (recorded in other assets)	0	0
Liabilities:
Derivative contracts (recorded in other liabilities)	0	0
Government bonds
Assets:
Government bonds	4,767	5,052
Government bonds \| Level 1
Assets:
Government bonds	4,767	5,052
Government bonds \| Level 2
Assets:
Government bonds	0	0
Government bonds \| Level 3
Assets:
Government bonds	0	0
Mutual funds
Assets:
Mutual funds	743	33,677
Mutual funds \| Level 1
Assets:
Mutual funds	743	33,677
Mutual funds \| Level 2
Assets:
Mutual funds	0	0
Mutual funds \| Level 3
Assets:
Mutual funds	$ 0	$ 0

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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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. Includes assets not subject to a master netting arrangement and not elected to be offset.

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Fair value, after the 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 not subject to a master netting arrangement and not elected to be offset.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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