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Deposits
 9 Months Ended
Sep. 30, 2020
Deposits [Abstract]  
Deposits Deposits

The following table is a summary of deposits as of the dates shown: 
(Dollars in thousands)
September 30,
2020
 
December 31,
2019
 
September 30,
2019
Balance:
 
 
 
 
 
Non-interest bearing
$
10,409,747

 
$
7,216,758

 
$
7,067,960

NOW and interest-bearing demand deposits
3,294,071

 
3,093,159

 
2,966,098

Wealth management deposits
4,235,583

 
3,123,063

 
2,795,838

Money market
9,423,653

 
7,854,189

 
7,326,899

Savings
3,415,073

 
3,196,698

 
2,934,348

Time certificates of deposit
5,066,295

 
5,623,271

 
5,619,236

Total deposits
$
35,844,422

 
$
30,107,138

 
$
28,710,379

Mix:
 
 
 
 
 
Non-interest bearing
29
%
 
24
%
 
25
%
NOW and interest-bearing demand deposits
9

 
10

 
10

Wealth management deposits
12

 
10

 
10

Money market
26

 
26

 
25

Savings
10

 
11

 
10

Time certificates of deposit
14

 
19

 
20

Total deposits
100
%
 
100
%
 
100
%


Wealth management deposits represent deposit balances (primarily money market accounts) at the Company’s subsidiary banks from brokerage customers of Wintrust Investments, LLC ("Wintrust Investments"), Chicago Deferred Exchange Company ("CDEC"), trust and asset management customers of the Company and brokerage customers from unaffiliated companies.