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Regulatory Matters (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
CET1 capital (to risk weighted assets) minimum required for capital adequacy purposes	7.00%	6.375%
CET1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations	6.50%	6.50%
Total capital (to risk weighted assets) minimum required for capital adequacy purposes	10.50%	9.875%
Total capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations	10.00%	10.00%
Tier 1 capital (to risk weighted assets) minimum required for capital adequacy purposes	8.50%	7.875%
Tier 1 capital (to risk weighted assets) to be well capitalized under prompt corrective action regulations	8.00%	8.00%
Tier 1 capital (to average assets) minimum required for capital adequacy purposes	4.00%	5.00%
Tier 1 capital (to average assets) to be well capitalized under prompt corrective action regulations	5.00%	5.00%
Bank [Member]
CET1 capital (to risk weighted assets) actual amount	$ 1,225,486	$ 1,147,151
CET1 capital (to risk weighted assets) actual ratio	14.64%	14.23%
Total capital (to risk weighted assets) actual amount	$ 1,299,223	$ 1,217,140
Total capital (to risk weighted assets) actual ratio	15.52%	15.10%
Tier 1 capital (to risk weighted assets) actual amount	$ 1,225,486	$ 1,147,151
Tier 1 capital (to risk weighted assets) actual ratio	14.64%	14.23%
Tier 1 capital (to average assets) actual amount	$ 1,225,486	$ 1,147,151
Tier 1 capital (to average assets) actual ratio	13.18%	13.78%
Parent Company [Member]
CET1 capital (to risk weighted assets) actual amount	$ 1,082,516	$ 1,007,438
CET1 capital (to risk weighted assets) actual ratio	12.87%	12.49%
Total capital (to risk weighted assets) actual amount	$ 1,362,253	$ 1,297,427
Total capital (to risk weighted assets) actual ratio	16.20%	16.08%
Tier 1 capital (to risk weighted assets) actual amount	$ 1,082,516	$ 1,007,438
Tier 1 capital (to risk weighted assets) actual ratio	12.87%	12.49%
Tier 1 capital (to average assets) actual amount	$ 1,082,516	$ 1,007,438
Tier 1 capital (to average assets) actual ratio	11.62%	12.10%

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The amount of CET1 capital as defined in the regulations.

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The amount of total capital as defined in the regulations.

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Tier 1 Leverage Capital as defined in the regulations. Also called Core Capital.

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