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Shareholders' Equity (Tables)
 12 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Summary of Required Regulatory Capital
Required Regulatory Capital
 
 
 
 
 
 
 
 
 
Minimum for Capital Adequacy
Purpose (1)
 
Minimum To Be Well
Capitalized Under Prompt
Corrective Action Provisions
 
 
 
Amount
 
Ratio
 
Amount
 
Ratio
 
Amount
 
Ratio
 
 
 
(Dollars in thousands)
 
SEACOAST BANKING CORP
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(CONSOLIDATED)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
At December 31, 2017:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Capital Ratio (to risk-weighted assets)
 
$
619,746
 
 
14.24
%
$
348,191
 
 
≥ 8.00
%
 
n/a
 
 
n/a
 
Tier 1 Capital Ratio (to risk-weighted assets)
 
 
592,562
 
 
13.61
 
 
261,143
 
 
≥ 6.00
%
 
n/a
 
 
n/a
 
Common Equity Tier 1 Capital (to risk-weighted assets)
 
 
523,832
 
 
12.04
 
 
195,858
 
 
≥ 4.50
%
 
n/a
 
 
n/a
 
Tier 1 Leverage Ratio (to adjusted average assets)
 
 
592,562
 
 
10.68
 
 
221,863
 
 
≥ 4.00
%
 
n/a
 
 
n/a
 
At December 31, 2016:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Capital Ratio (to risk-weighted assets)
 
$
432,058
 
 
13.25
%
$
260,790
 
 
≥ 8.00
%
 
n/a
 
 
n/a
 
Tier 1 Capital Ratio (to risk-weighted assets)
 
 
408,596
 
 
12.53
 
 
195,592
 
 
≥ 6.00
%
 
n/a
 
 
n/a
 
Common Equity Tier 1 Capital (to risk-weighted assets)
 
 
351,769
 
 
10.79
 
 
146,694
 
 
≥ 4.50
%
 
n/a
 
 
n/a
 
Tier 1 Leverage Ratio (to adjusted average assets)
 
 
408,596
 
 
9.15
 
 
178,656
 
 
≥ 4.00
%
 
n/a
 
 
n/a
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
SEACOAST NATIONAL BANK
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(A WHOLLY OWNED BANK SUBSIDIARY)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
At December 31, 2017:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Capital Ratio (to risk-weighted assets)
 
$
565,149
 
 
13.04
%
$
346,780
 
 
≥ 8.00
%
$
433,475
 
 
≥ 10.00
%
Tier 1 Capital Ratio (to risk-weighted assets)
 
 
537,965
 
 
12.41
 
 
260,085
 
 
≥ 6.00
%
 
346,780
 
 
≥ 8.00
%
Common Equity Tier 1 Capital (to risk-weighted assets)
 
 
537,965
 
 
12.41
 
 
195,022
 
 
≥ 4.50
%
 
281,759
 
 
≥ 6.50
%
Tier 1 Leverage Ratio (to adjusted average assets)
 
 
537,965
 
 
9.72
 
 
221,432
 
 
≥ 4.00
%
 
276,791
 
 
≥ 5.00
%
At December 31, 2016:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Total Capital Ratio (to risk-weighted assets)
 
$
415,147
 
 
12.75
%
$
260,491
 
 
≥ 8.00
%
$
325,987
 
 
≥ 10.00
%
Tier 1 Capital Ratio (to risk-weighted assets)
 
 
391,685
 
 
12.03
 
 
195,368
 
 
≥ 6.00
%
 
260,790
 
 
≥ 8.00
%
Common Equity Tier 1 Capital (to risk-weighted assets)
 
 
391,685
 
 
12.03
 
 
146,526
 
 
≥ 4.50
%
 
211,892
 
 
≥ 6.50
%
Tier 1 Leverage Ratio (to adjusted average assets)
 
 
391,685
 
 
8.78
 
 
178,501
 
 
≥ 4.00
%
 
223,320
 
 
≥ 5.00
%
 
(1)
Excludes capital conservation buffer of 1.250% the Company is subject to, which if not exceeded may constrain dividends, equity repurchases and compensation.