Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2020

Broker-Dealer, Net Capital Requirement, SEC Regulation [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, 2020 and 2019.

	Actual				Minimum Capital Adequacy				Minimum Capital Adequacy with Capital Buffer				To Be Well Capitalized Under Prompt Corrective Action Provisions
(Dollars in thousands)	Amount		Ratio		Amount		Ratio		Amount		Ratio		Amount		Ratio
2020
Total Capital (to Risk-Weighted Assets):
1st Source Corporation	$	966,092	15.99	%	$	483,350	8.00	%	$	634,397	10.50	%	$	604,188	10.00	%
1st Source Bank	881,983		14.59		483,637		8.00		634,774		10.50		604,546		10.00
Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	889,709		14.73		362,513		6.00		513,560		8.50		483,350		8.00
1st Source Bank	805,556		13.32		362,728		6.00		513,864		8.50		483,637		8.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	788,884		13.06		271,884		4.50		422,931		7.00		392,722		6.50
1st Source Bank	761,731		12.60		272,046		4.50		423,182		7.00		392,955		6.50
Tier 1 Capital (to Average Assets):
1st Source Corporation	889,709		12.15		292,977		4.00		N/A		N/A		366,221		5.00
1st Source Bank	805,556		11.00		292,959		4.00		N/A		N/A		366,199		5.00
2019
Total Capital (to Risk-Weighted Assets):
1st Source Corporation	$	882,453	14.90	%	$	473,782	8.00	%	$	621,839	10.50	%	$	592,227	10.00	%
1st Source Bank	804,131		13.57		474,189		8.00		622,373		10.50		592,736		10.00
Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	807,926		13.64		355,336		6.00		503,393		8.50		473,782		8.00
1st Source Bank	729,541		12.31		355,642		6.00		503,826		8.50		474,189		8.00
Common Equity Tier 1 Capital (to Risk-Weighted Assets):
1st Source Corporation	743,467		12.55		266,502		4.50		414,559		7.00		384,948		6.50
1st Source Bank	722,082		12.18		266,731		4.50		414,915		7.00		385,279		6.50
Tier 1 Capital (to Average Assets):
1st Source Corporation	807,926		12.19		265,122		4.00		N/A		N/A		331,402		5.00
1st Source Bank	729,541		11.03		264,500		4.00		N/A		N/A		330,625		5.00