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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract] |
Restrictions on Cash and Cash Equivalents | The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the statements of financial position that sum to the total of amounts shown in the Consolidated Statements of Cash Flows:
| December 31,
| 2019 |  | 2018 |  | 2017
Cash and Cash Equivalents | $ | 633,808 |  |  | $ | 790,590 |  |  | $ | 609,587 |
Restricted Cash included in Other Assets | 10,078 |  |  | 9,506 |  |  | 7,798 |
Total Cash, Cash Equivalents and Restricted Cash shown in the Statement of Cash Flows | $ | 643,886 |  |  | $ | 800,096 |  |  | $ | 617,385 |

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