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Condensed Financial Information - Parent Company Only Cash Flows (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Cash Flows From Operating Activities: |  |  |
Net Income | $ 178,040 | $ 226,339 | $ 208,393
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract] |  |  |
Amortization of issuance costs and discounts on long-term borrowings | 1,128 | 842 | 813
Stock-based compensation | 7,529 | 7,413 | 7,965
(Decrease) increase in other liabilities and payable to non-bank subsidiaries | (110,781) | (195,903) | (31,153)
Total adjustments | (23,552) | (98,626) | 88,427
Net cash provided by operating activities | 154,488 | 127,713 | 296,820
Cash Flows From Investing Activities |  |  |
Net cash used in investing activities | (2,499,480) | (893,346) | (740,717)
Cash Flows From Financing Activities: |  |  |
Repayments of long-term borrowings | (82,533) | (596,056) | (100,165)
Proceeds from long-term borrowings | 495,898 | 485,000 | 50,000
Net proceeds from issuance of preferred stock | 192,878 | 0 | 0
Net proceeds from issuance of common stock | 7,375 | 6,362 | 6,735
Dividends paid | (90,957) | (92,330) | (89,654)
Acquisition of treasury stock | (39,748) | (111,457) | (95,308)
Net cash provided by financing activities | 3,675,033 | 837,737 | 487,488
Parent |  |  |
Cash Flows From Operating Activities: |  |  |
Net Income | 178,040 | 226,339 | 208,393
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities [Abstract] |  |  |
Amortization of issuance costs and discounts on long-term borrowings | 1,128 | 842 | 813
Stock-based compensation | 7,529 | 7,413 | 7,967
(Increase) decrease in other assets | (307,976) | (20,449) | 6,327
Equity in undistributed net income of subsidiaries | (55,895) | (38,400) | (73,460)
(Decrease) increase in other liabilities and payable to non-bank subsidiaries | (244,598) | 1,580 | 36,273
Total adjustments | (599,812) | (49,014) | (22,080)
Net cash provided by operating activities | (421,772) | 177,325 | 186,313
Cash Flows From Investing Activities |  |  |
Net cash used in investing activities | 0 | 0 | 0
Cash Flows From Financing Activities: |  |  |
Repayments of long-term borrowings | (19,453) | 0 | 0
Proceeds from long-term borrowings | 370,898 | 0 | 0
Net proceeds from issuance of preferred stock | 192,878 | 0 | 0
Net proceeds from issuance of common stock | 7,375 | 6,362 | 6,733
Dividends paid | (90,956) | (92,330) | (89,654)
Acquisition of treasury stock | (39,748) | (111,457) | (95,308)
Net cash provided by financing activities | 420,994 | (197,425) | (178,229)
Net (Decrease) Increase in Cash and Cash Equivalents | (778) | (20,100) | 8,084
Cash and Cash Equivalents at Beginning of Year | 10,841 | 30,941 | 22,857
Cash and Cash Equivalents at End of Year | $ 10,063 | $ 10,841 | $ 30,941

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