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Fair Value, Measurement on Recurring and Nonrecurring Basis (Details) $ in Thousands, shares in Millions	Jun. 30, 2021 USD ($) item shares	Dec. 31, 2020 USD ($)
Financial assets:
Impaired loans, net	$ 165,666	$ 254,938
Allowance for credit losses on impaired loans	$ 98,731	106,265
Number of impaired loans | item	9
Aggregate carrying value, before reserves | shares	165.7
Carrying Value
Financial assets:
Derivative financial instruments	$ 2,387	3,892
Financial liabilities:
Derivative financial instruments	393	1,221
Fair Value
Financial assets:
Derivative financial instruments	2,387	3,892
Financial liabilities:
Derivative financial instruments	393	$ 1,221
Recurring basis | Carrying Value
Financial assets:
Derivative financial instruments	2,387
Financial liabilities:
Derivative financial instruments	393
Recurring basis | Fair Value
Financial assets:
Derivative financial instruments	2,387
Financial liabilities:
Derivative financial instruments	393
Nonrecurring basis | Carrying Value
Financial assets:
Impaired loans, net	66,935
Nonrecurring basis | Fair Value
Financial assets:
Impaired loans, net	66,935
Level 2 | Recurring basis
Financial assets:
Derivative financial instruments	2,263
Financial liabilities:
Derivative financial instruments	393
Level 3 | Recurring basis
Financial assets:
Derivative financial instruments	124
Level 3 | Nonrecurring basis
Financial assets:
Impaired loans, net	$ 66,935

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