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REGULATORY CAPITAL (Schedule of Regulatory Capital Amounts and Ratios) (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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The Bank [Member] |  |
Total Capital |  |
Total Capital (to risk-weighted assets) | $ 571,509 | $ 543,008
Total Capital (to risk-weighted assets) ratio | 13.76% | 14.59%
Minimum Capital required to be well-capitalized | $ 415,487 | $ 372,186
Minimum Capital required to be well-capitalized, ratio | 10.00% | 10.00%
Minimum amount of capital for adequacy purposes | $ 332,389 | $ 297,749
Minimum amount of capital for adequacy purposes, ratio | 8.00% | 8.00%
Tier I Capital (to risk-weighted assets) |  |
Tier 1 Capital (to risk-weighted assets) | $ 527,833 | $ 504,504
Tier 1 Capital (to risk-weighted assets) ratio | 12.70% | 13.56%
Minimum Tier 1 Capital required to be well-capitalized | $ 332,389 | $ 297,749
Minimum Tier 1 Capital required to be well-capitalized, ratio | 8.00% | 8.00%
Minimum amount of Tier 1 Capital for adequacy purposes | $ 249,292 | $ 223,311
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 6.00% | 6.00%
Common equity tier I |  |
Common equity tier 1 (to risk-weighted assets) | $ 527,832 | $ 504,502
Common equity tier I (to risk-weighted assets) ratio | 12.70% | 13.56%
Minimum Common equity tier I required to be well-capitalized | $ 270,066 | $ 241,921
Minimum common equity tier I required to be well-capitalized, ratio | 6.50% | 6.50%
Minimum amount of common equity tier I for adequacy purposes | $ 186,969 | $ 167,484
Minimum amount of common equity tier I for adequacy purposes, ratio | 4.50% | 4.50%
Tier I Leverage Capital (to average assets) |  |
Tier 1 Capital(to average assets) | $ 527,833 | $ 504,504
Tier 1 Capital (to average assets) ratio | 10.63% | 11.32%
Minimum Tier 1 Capital required to be well-capitalized | $ 248,252 | $ 222,912
Minimum Tier 1 Capital required to be well-capitalized, ratio | 5.00% | 5.00%
Minimum amount of Tier 1 Capital for adequacy purposes | $ 198,602 | $ 178,330
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 4.00% | 4.00%
The Bank [Member] | Conservation Buffer [Member] |  |
Total Capital |  |
Minimum amount of capital for adequacy purposes | $ 436,261 | $ 367,533
Minimum amount of capital for adequacy purposes, ratio | 10.50% | 9.88%
Tier I Capital (to risk-weighted assets) |  |
Minimum amount of Tier 1 Capital for adequacy purposes | $ 353,164 | $ 293,096
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 8.50% | 7.88%
Common equity tier I |  |
Minimum amount of common equity tier I for adequacy purposes | $ 290,841 | $ 237,268
Minimum amount of common equity tier I for adequacy purposes, ratio | 7.00% | 6.38%
Tier I Leverage Capital (to average assets) |  |
Minimum amount of Tier 1 Capital for adequacy purposes | $ 198,602 | $ 178,330
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 4.00% | 4.00%
Parent Company [Member] |  |
Total Capital |  |
Total Capital (to risk-weighted assets) | $ 590,614 | $ 559,937
Total Capital (to risk-weighted assets) ratio | 14.20% | 15.03%
Minimum amount of capital for adequacy purposes | $ 332,783 | $ 298,047
Minimum amount of capital for adequacy purposes, ratio | 8.00% | 8.00%
Tier I Capital (to risk-weighted assets) |  |
Tier 1 Capital (to risk-weighted assets) | $ 463,521 | $ 438,240
Tier 1 Capital (to risk-weighted assets) ratio | 11.14% | 11.76%
Minimum amount of Tier 1 Capital for adequacy purposes | $ 249,587 | $ 223,535
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 6.00% | 6.00%
Common equity tier I |  |
Common equity tier 1 (to risk-weighted assets) | $ 463,520 | $ 438,238
Common equity tier I (to risk-weighted assets) ratio | 11.14% | 11.76%
Minimum amount of common equity tier I for adequacy purposes | $ 187,190 | $ 167,652
Minimum amount of common equity tier I for adequacy purposes, ratio | 4.50% | 4.50%
Tier I Leverage Capital (to average assets) |  |
Tier 1 Capital(to average assets) | $ 463,521 | $ 438,240
Tier 1 Capital (to average assets) ratio | 9.33% | 9.82%
Minimum amount of Tier 1 Capital for adequacy purposes | $ 198,792 | $ 178,473
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 4.00% | 4.00%
Parent Company [Member] | Conservation Buffer [Member] |  |
Total Capital |  |
Minimum amount of capital for adequacy purposes | $ 436,778 | $ 367,902
Minimum amount of capital for adequacy purposes, ratio | 10.50% | 9.88%
Tier I Capital (to risk-weighted assets) |  |
Minimum amount of Tier 1 Capital for adequacy purposes | $ 353,582 | $ 293,390
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 8.50% | 7.88%
Common equity tier I |  |
Minimum amount of common equity tier I for adequacy purposes | $ 291,185 | $ 237,506
Minimum amount of common equity tier I for adequacy purposes, ratio | 7.00% | 6.38%
Tier I Leverage Capital (to average assets) |  |
Minimum amount of Tier 1 Capital for adequacy purposes | $ 198,792 | $ 178,473
Minimum amount of Tier 1 Capital for adequacy purposes, ratio | 4.00% | 4.00%

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