Deposits (Tables)

12 Months Ended

Dec. 31, 2019

Banking and Thrift [Abstract]

Deposit Account Balances

Deposit account balances are summarized as follows (dollars in thousands): 

	As of December 31,
	2019				2018
	Amount		Weighted Average Rate		Amount		Weighted Average Rate
Transaction:
Negotiable orders of withdrawal and interest-bearing checking	$	573,927	0.87	%	$	458,012	0.68	%
Non-interest bearing checking	387,409		—	%	395,375		—	%
Total transaction	961,336		0.52	%	853,387		0.36	%
Savings:
Money market	651,159		1.18	%	741,939		1.12	%
Savings	747,186		1.02	%	594,290		0.90	%
Total savings	1,398,345		1.09	%	1,336,229		1.02	%
Certificates of deposit:
Under $100,000	563,303		1.86	%	599,245		1.91	%
$100,000 or more	485,249		1.98	%	497,651		2.01	%
Total certificates of deposit	1,048,552		1.92	%	1,096,896		1.96	%
Total deposits	$	3,408,233	1.18	%	$	3,286,512	1.16	%

Maturities of Certificates of Deposit

Scheduled maturities of certificates of deposit are summarized as follows (in thousands): 

	December 31, 2019
2020	$	908,744
2021	46,856
2022	49,075
2023	35,008
2024	8,869
Total	$	1,048,552

Interest Expense on Deposits

Interest expense on deposits is summarized as follows (in thousands):

	Years Ended December 31,
	2019		2018		2017
Transaction	$	4,623	$	2,175	$	1,429
Savings	15,850		8,878		6,804
Certificates of deposit	20,855		16,688		8,153
	$	41,328	$	27,741	$	16,386