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Deposits
 3 Months Ended
Mar. 31, 2019
Deposits [Abstract]  
Deposits
Deposits

The following table is a summary of deposits as of the dates shown: 
(Dollars in thousands)
March 31,
2019
 
December 31,
2018
 
March 31,
2018
Balance:
 
 
 
 
 
Non-interest bearing
$
6,353,456

 
$
6,569,880

 
$
6,612,319

NOW and interest bearing demand deposits
2,948,576

 
2,897,133

 
2,315,122

Wealth management deposits
3,328,781

 
2,996,764

 
2,495,134

Money market
6,093,596

 
5,704,866

 
4,617,122

Savings
2,729,626

 
2,665,194

 
2,901,504

Time certificates of deposit
5,350,707

 
5,260,841

 
4,338,126

Total deposits
$
26,804,742

 
$
26,094,678

 
$
23,279,327

Mix:
 
 
 
 
 
Non-interest bearing
24
%
 
25
%
 
28
%
NOW and interest bearing demand deposits
11

 
11

 
10

Wealth management deposits
12

 
12

 
11

Money market
23

 
22

 
20

Savings
10

 
10

 
12

Time certificates of deposit
20

 
20

 
19

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.