7. Deposits

As of June 30, 2018 and December 31, 2017, deposits were categorized as interest-bearing or noninterest-bearing as follows:


(dollars in thousands)	June 30, 2018		December 31, 2017
U.S.:
Interest-bearing	$	10,672,224	$	10,800,140
Noninterest-bearing		5,361,179		5,494,803
Foreign:
Interest-bearing		758,231		685,129
Noninterest-bearing		603,904		632,050
Total deposits	$	17,395,538	$	17,612,122

The following table presents the maturity distribution of time certificates of deposit as of June 30, 2018:


	Under		$250,000
(dollars in thousands)	$250,000		or More		Total
Three months or less	$	205,600	$	1,290,991	$	1,496,591
Over three through six months		241,520		684,035		925,555
Over six through twelve months		427,839		498,123		925,962
One to two years		122,322		76,435		198,757
Two to three years		101,819		51,891		153,710
Three to four years		78,520		27,011		105,531
Four to five years		55,176		27,948		83,124
Thereafter		113		—		113
Total	$	1,232,909	$	2,656,434	$	3,889,343

Time certificates of deposit in denominations of $250,000 or more, in the aggregate, were $2.7 billion and $3.0 billion as of June 30, 2018 and December 31, 2017, respectively. Overdrawn deposit accounts are classified as loans and totaled $4.0 million and $2.7 million as of June 30, 2018 and December 31, 2017, respectively.