As of December 31, 2020, the Company has a line of credit with the FHLB that provides for advances totaling up to 40% of the Company’s assets, equating to a credit line of $7.94 billion, of which $4.74 billion was available for borrowing. The available for borrowing was based on collateral pledged by real estate loans with an aggregate balance of $7.25 billion.

At December 31, 2020, the Company had $31.0 million term advances, compared to $491.0 million in overnight FHLB advances and $26.0 million term advances at December 31, 2019. The term advances have maturity dates ranging from May 2021 to June 2022 and rates ranging from 0.00% to 2.47%.

The following table summarizes activities in advances from the FHLB for the periods indicated:


	Year Ended December 31,
	2020			2019
	(Dollars in thousands)
Average balance outstanding	$	139,190		$	404,959
Weighted average rate	1.10		%	2.43		%
Maximum amount outstanding at any month-end during the year	$	521,017		$	1,091,596
Balance outstanding at end of year	31,000			517,026
Weighted average interest rate at year-end	1.53		%	1.69		%

At December 31, 2020, the Bank had unsecured lines of credit with eight correspondent banks for a total amount of $340.0 million and access through the Federal Reserve discount window to borrow $21.3 million secured by investment securities. At December 31, 2020 and December 31, 2019, the Company had no outstanding balances against these lines.

The Company maintains additional sources of liquidity at the Corporation level. The $15.0 million line of credit with US Bank was established on June 2019 and expires on September 28, 2021. At December 31, 2020 and December 31, 2019 the Corporation had no outstanding balances against this line.

The following table summarizes activities in other borrowings for the periods indicated:


	Year Ended December 31,
	2020			2019
	(Dollars in thousands)
Average balance outstanding	$	251		$	229
Weighted average rate	0.16		%	0.63		%
Maximum amount outstanding at any month-end during the year	$	5,000		$	10,000
Balance outstanding at end of year	—			—
Weighted average interest rate at year-end	—		%	—		%