Note 11. FHLB Borrowings

The Company’s FHLB borrowings and weighted average interest rates are summarized below:

	September 30, 2018				December 31, 2017
	Amount		Rate		Amount		Rate
	(dollars in thousands)
Total FHLB borrowings	$	629,979	2.32	%	$	670,077	1.76	%

By remaining period to maturity:
Less than 1 year	$	459,979	2.24	%	$	505,077	1.59	%
1 year through less than 2 years		25,000	1.85	%		35,000	1.60	%
2 years through less than 3 years		95,000	2.76	%		85,000	2.65	%
3 years through less than 4 years		25,000	2.13	%		45,000	2.15	%
4 years through 5 years		25,000	2.92	%		-	-
Total FHLB borrowings	$	629,979	2.32	%	$	670,077	1.76	%

The FHLB borrowings are secured by pledges of certain collateral including, but not limited to, U.S. government and agency mortgage-backed securities and a blanket assignment of qualifying first lien mortgage loans, consisting of both residential mortgages and commercial real estate loans.

Advances are payable at stated maturity, with a prepayment penalty for fixed rate advances. All FHLB advances are fixed rates. The advances at September 30, 2018 were primarily collateralized by approximately $1.7 billion of commercial mortgage loans, net of required over collateralization amounts, under a blanket lien arrangement. At September 30, 2018 the Company had remaining borrowing capacity of approximately $1.0 billion at FHLB.