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Deposits
 6 Months Ended
Jun. 30, 2019
Deposits [Abstract]  
Deposits Deposits

The following table is a summary of deposits as of the dates shown: 
(Dollars in thousands)
June 30,
2019
 
December 31,
2018
 
June 30,
2018
Balance:
 
 
 
 
 
Non-interest bearing
$
6,719,958

 
$
6,569,880

 
$
6,520,724

NOW and interest bearing demand deposits
2,788,976

 
2,897,133

 
2,452,474

Wealth management deposits
3,220,256

 
2,996,764

 
2,523,572

Money market
6,460,098

 
5,704,866

 
5,205,678

Savings
2,823,904

 
2,665,194

 
2,763,062

Time certificates of deposit
5,505,623

 
5,260,841

 
4,899,969

Total deposits
$
27,518,815

 
$
26,094,678

 
$
24,365,479

Mix:
 
 
 
 
 
Non-interest bearing
24
%
 
25
%
 
27
%
NOW and interest bearing demand deposits
10

 
11

 
10

Wealth management deposits
12

 
12

 
11

Money market
24

 
22

 
21

Savings
10

 
10

 
11

Time certificates of deposit
20

 
20

 
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.