The following table summarizes the FHLB advances as of December 31, 2019 and 2018:

	2019			2018
Federal Home Loan Bank advances	$	490,000		$	425,000
Weighted average cost		1.70	%		2.56	%

At December 31, 2019, fixed‑rate advances totaled $390.0 million, with interest rates ranging from 1.74% to 1.77% and maturities ranging from January 2020 to March 2020. Total variable rate advances were $100.0 million at December 31, 2019, with an interest rate of 1.47% that may reset daily, and matures in February 2020. The Company’s advances from the FHLB are collateralized by residential real estate loans, commercial real estate loans, and securities. The Company’s required investment in FHLB stock is $4.50 for every $100 in advances. Refer to Note 4—Securities for additional discussion. At December 31, 2019 and 2018, the Bank has additional borrowing capacity from the FHLB of $1.4 billion and $1.3 billion, respectively, subject to the availability of proper collateral. The Bank’s maximum borrowing capacity is limited to 35% of total assets.

The Company hedges interest rates on borrowed funds using interest rate swaps through which the Company receives variable amounts and pays fixed amounts. Refer to Note 22—Derivative Instruments and Hedging Activities for additional information.