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Condensed Financial Statements of Parent Company - Summary of Condensed Balance Sheets of Parent Company (Detail) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | ---
ASSETS |  |  |  |
Cash in subsidiary bank | $ 62,135 | $ 146,323 | $ 264,709 | $ 264,593
LIABILITIES AND SHAREHOLDERS’ EQUITY |  |  |  |
Other borrowings | 123,871 | 186,497 |  |
Total liabilities | 8,876,609 | 8,918,591 |  |
Shareholders' equity | 956,816 | 920,964 | 855,872 | 553,902
Total liabilities and shareholders’ equity | 9,833,425 | 9,839,555 |  |
Customers Bancorp |  |  |  |
ASSETS |  |  |  |
Cash in subsidiary bank | 16,684 | 67,231 | $ 54,441 | $ 54,567
Investments in and receivables due from subsidiaries | 1,061,389 | 1,039,883 |  |
Other assets | 3,417 | 3,160 |  |
Total assets | 1,081,490 | 1,110,274 |  |
LIABILITIES AND SHAREHOLDERS’ EQUITY |  |  |  |
Other borrowings | 123,871 | 186,497 |  |
Other liabilities | 803 | 2,813 |  |
Total liabilities | 124,674 | 189,310 |  |
Shareholders' equity | 956,816 | 920,964 |  |
Total liabilities and shareholders’ equity | $ 1,081,490 | $ 1,110,274 |  |

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