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Deposits
 6 Months Ended
Jun. 30, 2020
Deposits [Abstract]  
Deposits Deposits

The following table is a summary of deposits as of the dates shown: 
(Dollars in thousands)
June 30,
2020
 
December 31,
2019
 
June 30,
2019
Balance:
 
 
 
 
 
Non-interest bearing
$
10,204,791

 
$
7,216,758

 
$
6,719,958

NOW and interest bearing demand deposits
3,440,348

 
3,093,159

 
2,788,976

Wealth management deposits
4,433,020

 
3,123,063

 
3,220,256

Money market
9,288,976

 
7,854,189

 
6,460,098

Savings
3,447,352

 
3,196,698

 
2,823,904

Time certificates of deposit
4,837,387

 
5,623,271

 
5,505,623

Total deposits
$
35,651,874

 
$
30,107,138

 
$
27,518,815

Mix:
 
 
 
 
 
Non-interest bearing
29
%
 
24
%
 
24
%
NOW and interest bearing demand deposits
10

 
10

 
10

Wealth management deposits
12

 
10

 
12

Money market
25

 
26

 
24

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"), CDEC, trust and asset management customers of the Company and brokerage customers from unaffiliated companies.