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Loans Receivable and Allowance for Credit Losses (Allowance for Credit Losses Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Financing Receivable Allowance for Credit Losses |  |  |
Financing receivable and off balance sheet credit loss allowance | $ 640,000 |  | $ 653,600
Decrease in allowance for credit losses | (13,600) |  |
Provision for (reversal of) credit losses | 0 | $ 73,870 |
Commercial lending |  |  |
Financing Receivable Allowance for Credit Losses |  |  |
Collateral dependent loan | 99,900 |  | 97,200
Consumer lending |  |  |
Financing Receivable Allowance for Credit Losses |  |  |
Collateral dependent loan | 16,600 |  | $ 17,300
Commercial and consumer lending |  |  |
Financing Receivable Allowance for Credit Losses |  |  |
Decrease to allowance for loan losses | (12,500) |  |
Decrease in allowance for unfunded credit commitments | $ (1,100) |  |

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- Definition Financing Receivable And Off Balance Sheet Credit Loss Allowance + References No definition available. + Details
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- Definition Financing Receivable And Off Balance Sheet Credit Loss Allowance, Period Increase (Decrease) + References No definition available. + Details
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- Definition Amount of increase (decrease) in allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447 + Details
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- Definition Amount of expense related loan transactions, lease transactions, credit loss from transactions other than loan and lease transactions, and other loss based on assessment of uncollectability from the counterparty to reduce the account to their net realizable value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.11) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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