Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2018

Regulatory Capital Requirements [Abstract]

Schedule of actual and required capital amounts and ratios

The following table shows the actual and required capital amounts and ratios for 1st Source Corporation and 1st Source Bank as of December 31, 2018 and 2017.



	Actual				Minimum Capital Adequacy				Minimum Capital Adequacy with Capital Buffer⁽¹⁾				To Be Well Capitalized Under Prompt Corrective Action Provisions
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
2018
Total Capital (to Risk-Weighted Assets):
1st Source Corporation	$	821,975	14.68	%	$	447,909	8.00	%	$	552,888	9.875	%	$	559,887	10.00	%
1st Source Bank	744,326		13.29		448,152		8.00		553,188		9.875		560,190		10.00
Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	751,575		13.42		335,932		6.00		440,911		7.875		447,909		8.00
1st Source Bank	673,888		12.03		336,114		6.00		441,150		7.875		448,152		8.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	693,067		12.38		251,949		4.50		356,928		6.375		363,926		6.50
1st Source Bank	672,380		12.00		252,086		4.50		357,121		6.375		364,124		6.50
Tier 1 Capital (to Average Assets):
1st Source Corporation	751,575		12.06		249,185		4.00		N/A		N/A		311,481		5.00
1st Source Bank	673,888		10.82		249,052		4.00		N/A		N/A		311,315		5.00
2017
Total Capital (to Risk-Weighted Assets):
1st Source Corporation	$	764,853	14.70	%	$	416,174	8.00	%	$	481,201	9.250	%	$	520,218	10.00	%
1st Source Bank	696,248		13.36		416,902		8.00		482,043		9.250		521,127		10.00
Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	699,420		13.44		312,131		6.00		377,158		7.250		416,174		8.00
1st Source Bank	630,702		12.10		312,676		6.00		377,817		7.250		416,902		8.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	642,420		12.35		234,098		4.50		299,125		5.750		338,142		6.50
1st Source Bank	630,702		12.10		234,507		4.50		299,648		5.750		338,733		6.50
Tier 1 Capital (to Average Assets):
1st Source Corporation	699,420		12.17		229,890		4.00		N/A		N/A		287,362		5.00
1st Source Bank	630,702		10.98		229,789		4.00		N/A		N/A		287,236		5.00

(1) The capital conservation buffer requirement will be phased in over three years beginning in 2016. The capital buffer requirement effectively raises the minimum required common equity Tier 1 capital ratio to 7.0%, the Tier 1 capital ratio to 8.5%, and the total capital ratio to 10.5% on a fully phased-in basis.