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Condensed Statements of Cash Flow (Detail) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income (loss) | $ 422,417 | $ 466,201 | $ 495,401
Change in other assets | 29,952 | 451,873 | 326,790
Change in other liabilities | (53,320) | 23,329 | (4,336)
Net cash provided by operating activities | 540,355 | 1,326,710 | 755,653
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Net cash (used in) provided by investing activities | (4,020,466) | 1,061,740 | 1,218,165
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Treasury stock purchases | (160,767) |  |
Proceeds from issuance of preferred stock |  | 502,840 |
Net cash provided by (used in) financing activities | 2,426,897 | (418,131) | (1,953,642)
Net (decrease) increase in cash and cash equivalents | (1,053,214) | 1,970,319 | 20,176
Cash and cash equivalents at beginning of year | 2,528,169 | 557,850 | 537,674
Cash and cash equivalents at end of year | 1,474,955 | 2,528,169 | 557,850
Parent Company |  |  |
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income (loss) | 422,417 | 466,201 | 495,401
Change in other assets | 256 | 10,122 | 316
Change in other liabilities | (1,152) | (36,226) | (2,252)
Other, net | 36,677 | 36,330 | 33,333
Equity in (underdistributed) overdistributed earnings of subsidiaries | (83,880) | (162,316) | (193,760)
Net cash provided by operating activities | 374,318 | 314,111 | 333,038
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Proceeds from sales and repayments of securities |  | 2,000 |
Change in receivable from subsidiaries, net | (1,705) | 3,089 | (204)
Investment in subsidiaries |  | (420,000) |
Net cash (used in) provided by investing activities | (1,705) | (414,911) | (204)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Treasury stock purchases | (163,249) | (18,463) | (8,677)
Cash dividends paid on common and preferred stock | (365,889) | (356,768) | (330,810)
Proceeds from issuance of preferred stock |  | 502,840 |
Proceeds from issuance of subordinated notes | 294,607 |  |
Net cash provided by (used in) financing activities | (234,531) | 127,609 | (339,487)
Net (decrease) increase in cash and cash equivalents | 138,082 | 26,809 | (6,653)
Cash and cash equivalents at beginning of year | 90,536 | 63,727 | 70,380
Cash and cash equivalents at end of year | $ 228,618 | $ 90,536 | $ 63,727

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