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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2019 USD ($) segment | Jan. 01, 2019 USD ($) | Dec. 31, 2018 USD ($)
Dividends |  |  |
Period from which net retained earnings are available for dividend payment from the Bank to the Parent Company | 2 years |  |
Amount up to which dividends can be declared by the Bank to the Parent Company | $ 58,700 |  |
Cash dividends paid | 24,500 |  |
Income Taxes |  |  |
Unrecognized Tax Benefits | $ 0 |  | $ 0
Segment Reporting |  |  |
Number of reportable operating segment | segment | 1 |  |
Leases |  |  |
Operating lease right-of-use assets | $ 43,450 |  |
Operating Lease, Liability | $ 45,977 |  |
ASU 2016-02 | Measurement Period Adjustments |  |  |
Leases |  |  |
Operating lease right-of-use assets |  | $ 39,000 |
Operating Lease, Liability |  | $ 39,000 |
Core deposit intangibles |  |  |
Summary Of Accounting Policies [Line Items] |  |  |
Intangible assets, useful life (in years) | 10 years |  |
Buildings |  |  |
Summary Of Accounting Policies [Line Items] |  |  |
Useful life | 50 years |  |
Equipment, computer hardware and software and furniture and fixtures | Minimum |  |  |
Summary Of Accounting Policies [Line Items] |  |  |
Useful life | 2 years |  |
Equipment, computer hardware and software and furniture and fixtures | Maximum |  |  |
Summary Of Accounting Policies [Line Items] |  |  |
Useful life | 10 years |  |

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