(7) Deposits

Deposits as of December 31, 2017 and 2016 and related interest expense for the years ended December 31, 2017, 2016 and 2015 were as follows:


	2017		2016
	(Dollars in Thousands)
Deposits:
Demand - non-interest bearing
Domestic	$	2,609,932	$	2,509,544
Foreign		633,323		648,507
Total demand non-interest bearing		3,243,255		3,158,051
Savings and interest bearing demand
Domestic		2,615,143		2,589,675
Foreign		629,988		614,053
Total savings and interest bearing demand		3,245,131		3,203,728
Time, certificates of deposit $100,000 or more
Domestic		637,006		748,104
Foreign		808,881		838,161
Less than $100,000
Domestic		354,998		389,682
Foreign		255,621		272,363
Total time, certificates of deposit		2,056,506		2,248,310
Total deposits	$	8,544,892	$	8,610,089


	2017		2016		2015
	(Dollars in Thousands)
Interest expense:
Savings and interest bearing demand
Domestic	$	5,453	$	3,922	$	3,026
Foreign		755		640		567
Total savings and interest bearing demand		6,208		4,562		3,593
Time, certificates of deposit $100,000 or more
Domestic		3,644		3,881		4,693
Foreign		4,105		3,929		4,116
Less than $100,000
Domestic		1,312		1,447		1,680
Foreign		675		706		744
Total time, certificates of deposit		9,736		9,963		11,233
Total interest expense on deposits	$	15,944	$	14,525	$	14,826

Scheduled maturities of time deposits as of December 31, 2017 were as follows:


	Total
	(in Thousands)
2018	$	1,859,507
2019		139,276
2020		41,572
2021		13,303
2022		2,760
Thereafter		88
Total	$	2,056,506

Scheduled maturities of time deposits in amounts of $100,000 or more at December 31, 2017, were as follows:


	Total
	(in Thousands)
Due within 3 months or less	$	557,206
Due after 3 months and within 6 months		348,695
Due after 6 months and within 12 months		404,776
Due after 12 months		135,210
	$	1,445,887

Time deposits that meet or exceed the FDIC insurance limit of $250,000 at December 31, 2017 and December 31, 2016 were $894,000 and $1,005,000, in thousands, respectively.