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Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2017

Banking and Thrift [Abstract]

Regulatory Capital Amounts and Ratios for Company and Bank

As of December 31, 2017 and 2016, the Company had $25.0 million of trust-preferred securities, which were included in Tier 1 capital for regulatory purposes, respectively. The following table summarizes regulatory capital amounts and ratios for the Company and the Bank as of December 31, 2017 and 2016.

		Actual								For Capital Adequacy Purposes												To Be Well Capitalized under Prompt Corrective Action Provisions
		Amount				Ratio				Amount								Ratio				Amount								Ratio
		(Dollars in thousands)
As of December 31, 2017:
Total Capital (to Risk-Weighted Assets)
Company		$	1,039,060				18.01%			$	461,574				³				8.00%												N/A
Bank		$	1,029,126				17.86%			$	461,037				³				8.00%			$	576,296			³					10.00%
Tier 1 Capital (to Risk-Weighted Assets)
Company		$	973,169				16.87%			$	346,180				³				6.00%												N/A
Bank		$	963,235				16.71%			$	345,778				³				6.00%			$	461,037			³					8.00%
Common equity Tier 1 capital ratio
Company		$	948,210				16.43%			$	259,635				³				4.50%												N/A
Bank		$	963,235				16.71%			$	259,333				³				4.50%			$	374,592			³					6.50%
Tier 1 Capital (to Average-Assets)
Company		$	973,169				11.88%			$	327,680				³				4.00%												N/A
Bank		$	963,235				11.77%			$	327,397				³				4.00%			$	409,246			³					5.00%
As of December 31, 2016:
Total Capital (to Risk-Weighted Assets)
Company		$	982,461				18.19%			$	432,081				³				8.00%												N/A
Bank		$	971,681				18.01%			$	431,576				³				8.00%			$	539,471			³					10.00%
Tier 1 Capital (to Risk-Weighted Assets)
Company		$	914,937				16.94%			$	324,061				³				6.00%												N/A
Bank		$	904,236				16.76%			$	323,682				³				6.00%			$	431,576			³					8.00%
Common equity Tier 1 capital ratio
Company		$	890,118				16.48%			$	243,046				³				4.50%												N/A
Bank		$	904,236				16.76%			$	242,762				³				4.50%			$	350,656			³					6.50%
Tier 1 Capital (to Average-Assets)
Company		$	914,937				11.49%			$	318,552				³				4.00%												N/A
Bank		$	904,236				11.36%			$	318,305				³				4.00%			$	397,882			³					5.00%

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- References

No definition available.

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- Definition

Tabular disclosure of the capital amounts and ratios as of the balance sheet date, indicating whether the entity or entities are in compliance with regulatory capital requirements, by entity.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1B
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958570-112826

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958568-112826

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1H
-Subparagraph (c)(2)
-URI http://asc.fasb.org/extlink&oid=84167132&loc=d3e65071-112826

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 505
-Section 50
-Paragraph 1G
-URI http://asc.fasb.org/extlink&oid=84167132&loc=SL5958577-112826

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